2013 was not the time for these lovers! From Rob Pattinson and Kristen Stewart to Justin Bieber and Selena Gomez, see which Hollywood relationships didn't make it through to 2014 in our gallery!
Adam Levine and Nina Agdal
A short-lived romance, indeed. The Maroon 5 frontman and the Sports Illustrated model started dating in May, as Us Weekly reported and were seen getting flirty on a June vacay to Mexico. But it ended shortly after, with Levine getting engaged on July 16 to his ex, Behati Prinsloo. "Adam just went MIA on Nina and stopped answering her calls," a source told Us. "He finally told her about Behati in a text message." A source quipped, "She's fine."