Mariah Carey, Nick Cannon, and their newborn twins, Moroccan and Monroe, finally headed home from the hospital together on Sunday night in their Rolls-Royce Phantom. Monroe and Moroccan were in their car seats under pink and blue blankets while the proud new mom and dad beamed in the front. Bringing home the babies was the highlight of Nick's exciting weekend. He made a cameo at the Wango Tango concert, where Britney Spears, Ryan Seacrest, Ke$ha, and J Lo took the stage. Nick is ready to welcome the babies and Mariah back home, but he'll be doing double duty parenting and promoting his new comedy album, Mr. Showbiz. Mariah Carey may also have plans to release new music by the end of the year, according to Nick. He said, "She's been working away, and we have a studio in the crib, and [the pregnancy] has totally inspired her on so many different levels. You're definitely gonna see some new phenomenal music from Mariah."