Justin Bieber arrived at the recording studio in Los Angeles in an Uber on Tuesday (luckiest driver EVER!), and though he flashed us his sexy smile and a peace sign for a few photos, he wasn't in the best mood. What's eating the Biebs?!

The 22-year-old pop superstar was not with his usual team of bodyguards, so perhaps that's why he was a bit on edge? After crossing the street, Bieber grew annoyed with the photogs, asking, "How many pictures do you need?" When one of them pointed out that the singer wasn't in the best light, a few of the shutterbugs cracked up and Bieber remarked, "Don't smile and laugh at me!" Fair enough.

Speaking of Uber, apparently Biebs was just offered the role of a young pop star in the film Uber Girl, which is a script making the rounds in Hollywood. However, he turned it down because -- get this -- it would involve a sex scene with another guy. Co-writer Pete O’Neill told Page Six, “He won’t take the part unless the sex scene with him and one of the male backup dancers is taken out of the final script." Would Bieber really take on a role like this in the first place though? Hmm...