Mariah Carey sexy red dress singing tree lighting holiday Rockefeller Center

Mariah Carey squeezed into a sexy red dress and performed at the 81st annual Rockefeller Center Christmas tree lighting ceremony in New York on Tuesday evening, and we're not sure which songs she sang, but we'll find out when the special airs tomorrow on NBC! (Though we're pretty sure Mimi belted out "All I Want For Christmas Is You," which is one of our favs from her holiday albums).

Mariah then changed into the white number below and wrote on her Instagram, "I know it's a lil' over the top lol #rockefellercenter #Christmastreelight." Isn't it always?!

Mariah Carey sexy white dress singing tree lighting holiday Rockefeller Center white dress

Mariah performed at the event in 2010 and 2012, and this year other performers include Kelly Clarkson, the Goo Goo Dolls, Jewel, Mary J. Blige, Toni Braxton and Ariana Grande. Whew! That's quite a mix...