If you think about it, famous relationships are pretty deceiving. Since we're so used to seeing celebrities look perfect in public, it's easy to assume that their romance is all sunshine and roses. However, stars like Joe Jonas and Liam Hemsworth have proved that this isn't always the case, and they even went as far as reportedly cheating on their partners with other stars. Yikes!
Click through the gallery to see which stars have been accused of cheating on their famous partners with another celebrity!