Watch Mariah's AT&T Commercial

Mariah Carey makes a surprise cameo appearance in a new AT&T commercial touting the nation's fastest 3G network. The spot, which premieres nationally this week, features a concierge who relies on his AT&T smartphone with the nation's fastest 3G network to set up a hotel room before an important celebrity guest arrives.



Check out this exclusive interview with Mariah as she talks about the commercial, her role and how she uses mobile technology on a daily basis.