The Artist: Selena Gomez
The Exhaustion: Adults aren't the only people who can get exhausted. When you work as hard as a teenager like Gomez does, exhaustion can also become an issue. And it did for her back in June when she had to be hospitalized for a combination of food poisoning and exhaustion.
The Result: After getting a couple days of rest, Justin Bieber's boo was back to her old self and back on stage for a performance in Los Angeles.