Backstage with The Hills Cast... and Mariah Carey!

Our three favorite stars - and Mariah Carey - took center stage celebrating the return of Season Three of The Hills Monday at New York City's Gotham Hall.

The pop star, with 17 #1 singles to her credit throughout her career, performed hits such as "Touch My Body" and "We Belong Together" on a live after show.

Mariah Carey then met with the beautiful trio of stars that make The Hills great - Lauren Conrad, Audrina Patridge and Whitney Port - backstage. See below...

Miss any of the action? Just want to kill time reading about Lauren, Whitney and Heidi? Check out our official recap of Monday's episode of The Hills.