Who doesn't love a good Summer fling? As the weather gets hotter, so do celebrity relationships. Zac Efron [1] and Michelle Rodrigues couldn't keep their hands off each other in Ibiza while Ian Somerhalder [2] and Nikki Reed [3] made the farmer's market their PDA spot. Big Sean rebounded from Naya Rivera right into the arms of Ariana Grande [4] and Khloe Kardashian brought French Montana just about everywhere with her. Check out the sexiest celebrity Summer romances and let us know — do you think they'll last?

Ian wrapped his arm around Nikki.

Ariana Grande [5] and Big Sean showed off their chemistry on stage.

Big Sean couldn't keep his hands off Ariana Grande [6].

Khloe Kardashian and French Montana were inseparable this Summer.

Khloe Kardashian brought French Montana to her birthday party in Vegas.