Denzil Foster and Thomas McElroy are an American R&B record production and songwriting duo, releasing recordings under the names Foster & McElroy and Fmob. They have written and produced songs for musicians such as Club Nouveau, Tony! Toni! Toné!, Alexander O'Neal, Regina Belle, Madonna, and Swing Out Sister. Their music has been sampled in hit songs by the Luniz, Puff Daddy, Ashanti, Jay-Z, Jennifer Lopez, LL Cool J, Jessica Simpson, and others. Foster & McElroy are best known as the founders of the group En Vogue, listed by Billboard as one of the Top 10 Girl Groups of All Time. In addition to producing music for various television shows, they are also credited for songs in numerous movie soundtracks including The Great White Hype, Lean on Me, and Who's That Girl.