Report: Timberlake and Biel break up

LOS ANGELES, Sept. 30 (UPI) -- U.S. pop star Justin Timberlake and actress Jessica Biel have ended their three-year courtship, a mutual friend told Usmagazine.com.

The source said Timberlake broke up with Biel on the phone. "It was about a month ago," the friend reported, adding the actress is in "severe denial and won't accept" the relationship is over.

"There's no way of knowing if it's a firm breakup, because with them it's so hot and cold," another source told Usmagazine.com.

Timberlake previously dated singer Britney Spears and actress Cameron Diaz.