I'm not a fan, but I have a story to share regarding my sister's boyfriend (I'll call him SB)
So SB was at a birthday party with some friends near a bar in LA (where he lives), when his troublesome friend (TF) decided to go into the bar. The bouncer, who just saw some stranger coming from the general direction of the shadier end of the street, was not having it. SB, who had been within the bouncer's line of sight the whole time, told him "It's cool, TF's with me; we're here for a birthday party, he's not doing anything shady over there" to which the bouncer responds: "Oh, you're together? Then YOU'RE not getting in, either." SB starts getting pretty annoyed (even though he hadn't planned to enter from the beginning), and he's about to argue when he noticed somebody come up behind and between SB and TF. SB turns to look, and grins because it's Justin freakin Bieber. The bouncer looks between the three of them, then to JB: "these two with you?"
JB looks between SB and TF, then says "Yeah" in kind of a "duh" voice. Bouncer lets them in, TF takes off to do whatever once inside. SB goes to thank JB and tell him he's a huge fan, to which JB responds with something along the lines of "No problem, dude. Actually, come with me a sec" and leads him straight to the VIP section before leaving him to enjoy his stay. SB wastes no time in calling the rest of the party (besides F, who was off somewhere else) up to the VIP section, and waving to the bouncer to let them pass. A few minutes later, TF appears in the VIP section, having snuck through the offices and kitchens to get there, and sees he's been beaten by SB and the rest of the party, thanks to JB.