'Idol' Sparks, singer Tank perform impromptu duet

Jordin Sparks didn't just get designer clothes when she went to the Grammys' official gifting suite in Los Angeles — she also found a musical partner.

The "American Idol" champ performed an impromptu duet with Grammy-nominated R&B singer Tank on Friday while the pair took a break from selecting potential outfits at the Grammy Style Studio.

"He's so amazing!" the 18-year-old singer gushed as she saw Tank playing a melody on a piano in the room. Moments later, he coaxed Sparks to join him in a performance, improvising a song with the chorus "I don't ever want to lose you." They sang it for a couple of minutes as a crowd gathered and broke out into applause.