Keira Knightley (29) and Selena Gomez (22) have been out in a bar together where they've tried to hit on the same hot guy.
Torn between the two, the guy suggests he will leave with the girl who defeats the other in an armwrestling match.
Without hesitation, Selena and Keira face the challenge...
The loser, left behind frustrated and mortified, decides to follow the one night stand couple out into the car park and challenge the other girl to a full on fight with no rules...
Selena Gomez: 22 years, 5'5", 54kg, cup B
Keira Knightley: 29 years, 5'7", 54kg, cup A