Fellow Canadian artists Justin Bieber and Ryan Adams flew out to Berlin to perform a surprise Acoustic duet of Bieber's original hit maker "Baby" at a Universal Music event. Bieber also debuted short Bleach Blonde Hair stuffed under a black baseball cap and hoodie as he bounced around the stage to Adam's Acoustic guitar strums in a rather off-the-cuff performance. Bieber handled both the vocal arrangement and Ludacris's rap verse with that famous line, "She woke me up daily / Don't need ** Starbucks."