04/13/2015 AT 10:15 AM EDT  has musical chops – but apparently her skills don't extend to dancing. The actress said that, even after months of practice for the upcoming sequel to the hit comedy, she still struggles to burn up the dance floor.  "One of my favorite scenes to do in  was this number where we really get dirty with our dancing," Snow, 29, tells  in its May issue, which hits newsstands on April 14. "We had a month of rehearsals learning how to do things I'm just not cool enough to do in my real life."  Snow says that she couldn't grasp one dance move in particular – twerking. "Iâm a really bad twerker – I still haven't figured out how to do it," she says. "I actually hurt my back one day. I woke up the next morning and my back was completely tweaked out â¦ from twerking."  Snow also discussed her relationship with  star Tyler Hoechlin, 27, who she's been dating since early 2013. The star said she likes to keep her relationship with the hunky actor private, so it doesn't "lose its magic."  "We like to keep our moments to ourselves, which is why we don't do much social media," she says. "We're not hiding anything. We're not not wanting people to know."  "Social media, for me, is about interacting with people who follow my career," Snow added. "I don't think my relationship has anything to do with my career. So we just keep it simple, try not to think about it that much, and just be us." The  of the hilarious movie about a college female acappella group hits theaters on May 15.
The Pitch Perfect 2 star says she struggled to pick up the popular dance move when rehearsing for the big sequel