VIDEO: Mariah Carey Talks Whitney Houston, Having More Kids & More on BRAVO

Superstar Mariah Carey stopped by last night's WATCH WHAT HAPPENS NOW on Bravo and revealed to host Andy Cohen the unusual instrument she used to write "All I Want for Christmas is You." Later, Carey talks about working with Whitney Houston and remembers her legacy. And find out what Mariah has to say when a caller asks her if she has thought about having more children.

Check out the appearance below and click here to view more clips from last night's show!

About the show:

'Watch What Happens: Live' is Bravo's late-night, interactive talk show that features guests from the world of entertainment, politics, and pop culture. Hosted by Andy Cohen, the series includes lively debates on everything from fashion, the latest on everyone's favorite Bravolebrities, and what celebrity is making headlines that week.

Past guests who have joined Cohen in the Bravo Clubhouse include Sarah Jessica Parker, Tina Fey, Iman, Liam Neeson, Kelly Ripa, Jimmy Fallon, Anderson Cooper, Molly Shannon, Matthew Broderick, and Lance Bass.