Nicole Prescovia Elikolani Valiente Scherzinger (born June 29, 1978) is an American singer, songwriter, dancer and occasional actress who is best known as the lead singer of the Pussycat Dolls.

Kara Elizabeth DioGuardi (pronounced /ˈkærə diːɵˈɡwɑrdi/; born December 9, 1970) is an American singer-songwriter, record producer, music publisher, A&R executive, composer and TV personality. She writes music primarily in the light pop-rock, dance, and R&B genres. DioGuardi has worked with many popular artists and is credited on over 120 album releases.