Kathy Hilton has a ball as she joins forces with Paula Abdul for a duet at Paris Hilton’s wedding

Kathy Hilton and Paula Abdul both looked as if they were having a blast when they sang a song for the crowd at Paris Hilton’s lavish Bel-Air wedding on Thursday.

Paris’ 62-year-old mother and the 59-year-old singer and choreographer took to the stage at the reception to belt out a tune together.

Although it wasn’t clear what song the old friends settled on, they both took turns sitting backward on a chair, which may have been a reference to the chair used in an early video for Paula’s hit song Straight Up from 1988.

Letting loose: Kathy Hilton, 62, and Paula Abdul, 59, both looked as if they were having a blast when they performed a duet together at Paris Hilton’s wedding on Thursday

Paula looked chic in a plunging burgundy jumpsuit with ruffled pant legs.

The outfit featured semi-sheer sleeves, and she elevated her stature with platform heels.

Kathy looked effortlessly elegant in a black fishnet dress covered in gorgeous chandelier patterns made from silver sequins.

The outfit included a more revealing sheer panel over her chest, as well as sheer sleeves.

In sync: Kathy and Paula took to a small stage at the reception to belt out a duet while gazing dramatically into each other's eyes

In sync: Kathy and Paula took to a small stage at the reception to belt out a duet while gazing dramatically into each other’s eyes

Going all out: Although Kathy is one of the more reserved stars on The Real Housewives Of Beverly Hills, she totally let loose while entertaining the reception crowd

Going all out: Although Kathy is one of the more reserved stars on The Real Housewives Of Beverly Hills, she totally let loose while entertaining the reception crowd

Playing the hits: Although they were both featured on the microphone, Paula seemed to have it the majority of the time, suggesting that they were performing one of her own songs

Playing the hits: Although they were both featured on the microphone, Paula seemed to have it the majority of the time, suggesting that they were performing one of her own songs

Although Kathy is one of the more reserved stars on The Real Housewives Of Beverly Hills, she totally let loose while entertaining the reception crowd.

She and Paula gazed into each other’s eyes from opposite ends of the tiny stage as they crooned at one another.

Paris’ mother was also clapping up a storm for her collaborator while Paula was at the microphone.

Trade off: The two women had a white chair on stage with them, and they appeared to take turns sitting backward in it and facing the audience

Trade off: The two women had a white chair on stage with them, and they appeared to take turns sitting backward in it and facing the audience

Guest spot: Paula sang while sitting down and also tilted the microphone back so that Kathy could get in a line

Guest spot: Paula sang while sitting down and also tilted the microphone back so that Kathy could get in a line

The two women had a white chair on stage with them, and they appeared to take turns sitting backward in it and facing the audience.

Paula sang while sitting down and also tilted the microphone back so that Kathy could get in a line. 

The socialite also took a turn sitting while Paula got up and continued to sing.

Although they were both featured on the microphone, Paula seemed to have it the majority of the time, suggesting that they were performing one of her own songs. 

Stunners: Paula looked chic in a plunging burgundy jumpsuit with ruffled pant legs, while Kathy was effortlessly elegant in a black fishnet dress with chandelier like sequined designs

Stunners: Paula looked chic in a plunging burgundy jumpsuit with ruffled pant legs, while Kathy was effortlessly elegant in a black fishnet dress with chandelier like sequined designs

A classic: The performance featured a chair that they took turns sitting in, which may have been a reference to an alternate video of Paula singing her 1988 hit Straight Up

A classic: The performance featured a chair that they took turns sitting in, which may have been a reference to an alternate video of Paula singing her 1988 hit Straight Up

Chair dance: Paula danced over and sat on a chair in an early video for Straight Up, which was supplanted by the David Fincher–directed official video, which won four MTV Video Music Awards

Chair dance: Paula danced over and sat on a chair in an early video for Straight Up, which was supplanted by the David Fincher–directed official video, which won four MTV Video Music Awards

The two may have been recreating part of Paula’s dance with a chair in an alternate video for her iconic single Straight Up, which was released in 1989.

The official version of the video was shot after the song had already become a success on the charts by future Social Network director David Fincher.

The black-and-white clip featured Arsenio Hall with Paula and won four MTV Video Music Awards after becoming a mainstay on the network.

Paula is also famous for her work as a choreographer, so it was only fitting that she and Kathy also danced up a storm with other guests on the dance floor. 

The celebration also featured a musical performance from pop star Demi Lovato, who sang I Will Always Love You for Paris and Carter.

The couple did their first dance to the Bruno Mars version of Just The Way You Are, Vogue reported. 

Paris is noted for her side career as a DJ, so the reception fittingly ended with a DJ-led rager. 

Fancy footwork: Paula and Kathy also danced together during the reception

Fancy footwork: Paula and Kathy also danced together during the reception

Special performance: Paris and Carter were serenaded by Demi Lovato performing I Will Always Love You, and they did their first dance to Bruno Mars singing Just The Way You Are

Special performance: Paris and Carter were serenaded by Demi Lovato performing I Will Always Love You, and they did their first dance to Bruno Mars singing Just The Way You Are 

Although Kathy oozed elegance in her evening gown, she opted for a lighter ensemble when she arrived at her daughter’s wedding earlier on Thursday.

She looked almost casual as she emerged from her vehicle wearing a white linen robe with ruffled trim and a slim belt around her waist.

The cute outfit was print with pink hearts all over it.

She wore her blond locks in voluminous curls and accessorized with a black handbag decorated with a bow. 

Night and day: Kathy oozed elegance in her evening gown

Lightening things up: But she opted for a lighter ensemble when she arrived at her daughter's wedding earlier on Thursday

Night and day: Although Kathy oozed elegance in her evening gown, she opted for a lighter ensemble when she arrived at her daughter’s wedding earlier on Thursday

Simplicity: She looked almost casual as she emerged from her vehicle wearing a white linen robe with hearts printed on it and a slim belt around her waist

Simplicity: She looked almost casual as she emerged from her vehicle wearing a white linen robe with hearts printed on it and a slim belt around her waist

Read more at DailyMail.co.uk