AceShowbiz - Parents-to-be Mariah Carey and Nick Cannon celebrated the upcoming arrival of their twins with a blue and pink baby shower on Sunday, March 6. The R&B star and her husband arrived in style to the event, held at The Conservatory Grill at the Montage Hotel in Beverly Hills, in Carey's black Rolls-Royce.

The shower was adorned with pink roses and blue hydrangeas as well as pink and blue balloons. Guests, including "American Idol" judge Randy Jackson, enjoyed appetizers and champagne. Party witnesses tell UsMagazine.com, "Mariah and Nick seem very excited and anxious about finally having their babies. He was doting on her the entire night, rubbing her back and getting her water."

The couple is expecting twins of both sexes this spring. Website TooFab.com has obtained Carey's gift registry wish list, which includes a $2,000 custom-made bedding set, top-of-the-range car seat cover and a $1,200 toy giraffe. The couple received many lavish gifts at their shower, including two handmade chairs for the twins, bath toys, clothes and books.