Gomez and Bieber clash over Cyrus

Selena Gomez has warned Justin Bieber to stay away from Miley Cyrus.

Miley, 20, and 'The Hunger Games' actor Liam Hemsworth recently called off their engagement and Selena, 20, is reportedly worried her on/off boyfriend Justin will try to hook up with Miley, who he reportedly had a fling with a few years ago.