T.I., Christina Aguilera Collabo Is 'Amazing,' Alex Da Kid Says

'Castle Walls' will serve as the next single off the rapper's No Mercy, due out December 7.By James Dinh, with reporting by Tim Kash





T.I.

Photo: Moses Robinson/ WireImage




Producer Alex Da Kid might be relatively new to the industry, but the British hitmaker has already proven that he can strike gold when bringing together artists of different musical genres. With production credits on summertime scorchers like "Airplanes" (B.o.B and Hayley Williams) and "Love the Way You Lie" (Eminem and Rihanna), the 27-year-old music mind reveals he's now trying his hand with another duo: T.I. and Christina Aguilera.

While on the American Music Awards red carpet, Kid spoke to MTV News about "Castle Walls," the track he produced for the

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