PHARRELL WILLIAMS - PHARRELL ATTACKS LYING EX IN USHER SONG

Cult R+B producer PHARRELL WILLIAMS has got his own back on a cheating girlfriend by featuring her in a new USHER song.

The ever-busy N.E.R.D star, who has written songs for JUSTIN TIMBERLAKE, P DIDDY and MICHAEL JACKSON among others, spent five years trying to woo a pal's ex-girlfriend only to discover she was lying about her romances.

Williams has since moved on, but he decided to turn the episode into a song, SWEET LIES, for USHER's new album.

He says, "I found out she made up lies about her previous man, who's my boy, to make me feel comfortable.

"Now her and the dude are engaged, and she says she doesn't feel that's real, but I don't need the headache."