Lil Twist and Justin Bieber have been partners in crime for years—remember when Twist crashed Bieber's $100,000 Fisker Karma, as BFFs are wont to do? (Twist's YMCMB boss Lil Wayne didn't seem too happy about the intricacies of their friendship earlier this year, but what can you do?) The two are back to their old tricks on new song "Intertwine." But where their last collaboration was a Miley-featuring twerk-fest (literally), "Intertwine" is a sultry r&b cut. Have the two grown up? Stream the track below and decide.