Ian Somerhalder

It was an exciting week for stars between film festivals, family, and bikini fun. Miranda Kerr got sexy in a swimsuit for a hot Miami photo shoot, while Leonardo DiCaprio linked up with his The Great Gatsby costars for a glamorous photocall in Cannes. Jennifer Aniston hit the pavement in NYC for a shopping trip with fiancé Justin Theroux, and Jennifer Lopez turned up the heat during her performance on the American Idol finale.

That's not all the fun to go down this week — click through the rest of the great snaps!

Nina Dobrev and Ian Somerhalder were both in attendance at today's CW upfronts presentation in NYC. Nina and Ian walked the red carpet separately but during the event they shared the same stage even after news of their split was announced earlier this month. They were together for three years, though they became one of the many TV costar couples that couldn't make it work off screen when they called it quits.

Nina and Ian are in the Big Apple on behalf of The Vampire Diaries, which will air its season finale tonight — make sure to tune in for our LIVE Vampire Diaries viewing party tonight at 4:30 p.m. PDT/7:30 p.m. EDT.

Ian Somerhalder was in New Orleans yesterday, getting a drink at a gas station before taking a walk with family. It seems Ian went home to Louisiana once shooting for The Vampire Diaries wrapped for the season. It was good timing, since Ian's also recovering from his split from longtime girlfriend Nina Dobrev. Nina, 24, and Ian, 34, had been together for about three years, and apparently grew apart despite logging long hours on the set of their show together. Neither Ian nor Nina have commented on the breakup, but he did post a mysterious tweet just after news of their parting ways broke. He referenced playwright Lillian Hellman's quote, "People change and forget to tell each other." Another chapter is coming to a close for Ian, with the Vampire Diaries' season finale airing Thursday.

One of our favorite on- and offscreen couples, Nina Dobrev and Ian Somerhalder, have called it quits. The Vampire Diaries stars dated for over three years, and despite their breakup, they'll still be working together on set when the fifth season begins filming. Nina and Ian aren't the first TV costars to strike up a romantic relationship — small-screen duos like Rachel Bilson and Adam Brody, Blake Lively and Penn Badgley, and Vanessa Hudgens and Zac Efron also hooked up during their downtime, and leading ladies like Jennifer Garner, Emily VanCamp, and Sophia Bush were lucky enough to find love on more than one set. Click through to see 30 couples that took their love off screen — and even worked together well past their demise.

Nina Dobrev and Ian Somerhalder have reportedly broken up after three years of dating. The two met back in 2009 when they started filming The Vampire Diaries together, and they've both shared a lot of sweet moments over the years, be it friendly or romantic. We've rounded up the pair's most memorable interactions, so we can all look back fondly on their relationship. Click through to see Ian and Nina's best moments!