Credit: James Devaney/; Splash News Online

2011 was a big year for Hollywood hookups!

From Alec Baldwin's love for much-younger yoga teacher Hilaria Thomas to Jennifer Lopez's rebound romances with Bradley Cooper and Casper Smart, there were no shortage of pheromones amongst the stars!

While some hookups, like Ryan Phillippe and Demi Lovato, were "nothing serous," others, like Paul McDonald and Nikki Reed, led to matrimonial bliss!

Tell Us: Who was 2011's hottest couple to hook up?