Nicole Scherzinger says she's rehearsing "five to seven hours a day" with partner Derek Hough for DWTS, but she's still packing on the pounds.
"I'm gaining weight, but it's OK," the size-2 singer, 31, says while shooting her feature for Us Weekly's annual Hot Hollywood issue. Scherzinger, Brooke Burke and Erin Andrews have been named "Dancing With the Stars Divas" and will be feted Thursday in L.A.
"I'm gaining muscle," Scherzinger adds. "I'm used to rehearsal and preparing for tours with the Pussycat Dolls. My metabolism requires a lot more food."
Andrews has the opposite problem.
PHOTOS: Before they were on DWTS
"I cannot keep weight on me," moans the size-4 ESPN reporter, 31. "And [partner] Maks [Chmerkovskiy] is all, 'You've got to eat healthy, you've got to eat vitamins!' All I want is just, like, a 10-piece chicken McNuggets and cheeseburgers.
"I want to keep the fat on me!" she adds. "Everything is falling off me."
To find out who Scherzinger and Andrews think will win DWTS (it's not them!), what really goes on in the "celebaquarium," and which guy spends "the most time in the makeup chair," watch the video above, and pick up the new issue of Us Weekly!