From the Unforced Celebrity Errors Department: When a 15-year-old fan threw an Argentinean flag into Justin Bieber's open car window in New York, he tossed it right back out before being driven away. Naturally, the teen girl was crushed, since she'd been waiting outside just for a glimpse of him as he left. She was also embarrassed, as the way the flag landed was closer to the Biebs than she intended. She reportedly described the incident in a Facebook post:

Of course it was not my intention for it to fall close to his face, so I apologized a thousand times. He looked at me... grabbed the flag, threw it on the pavement and shut the window.

Sources: Yahoo! News | The Hollywood Reporter