Poll Quiz·Posted on Dec 19, 2016Which "Carpool Karaoke" Session Is Actually The Best?Bieber? Bruno? Broadway?by Rachel OrnsteinCommunity ContributorApproved and edited by BuzzFeed Community TeamLinkFacebookPinterestTwitterMail Did you know you can sign up for a BuzzFeed Community account and create your own BuzzFeed posts? Here's a handy guide to help you start posting today!