Who sings the sing that goes "I like the way u workin, no diggity, no doubt"?

That song is “No Diggity” by Blackstreet. It was released in 1996 on the album “Another Level,” and won a Grammy award for Best R&B Performance by a Duo or Group. The song uses an acoustic guitar riff from the song “Grandma’s Hands” by Bill Withers. Blackstreet sings the singing verses of the song, while rap verses are performed by Dre, Teddy Riley and Queen Pen. The beats from the song were originally intended for 2Pac, but when 2Pac left Death Row Records, Dre sold the beats to Blackstreet.

Wednesday, February 01 2012
Source: http://www.songfacts.com/detail.php?id=5290