When asked by the British paper The Sun to name one moment in her career that she'd most want to forget, one of those mishaps came to mind.
"There was a time when I was wearing this sparkly outfit onstage but forgot the booty shorts to go with it and twirled around," Carly recalls. "I basically showed everyone near the front of the stage my bright pink underwear!"
And the moment she'd least want to forget -- because it was so great -- was her performance earlier this year in Mexico City with Justin Bieber. "My biggest concert ever: 300,000 people!" she says.
Carly also was asked by The Sun to name the weirdest fan present she was ever given: she says it was a pumpkin with her face carved into it, which she saw while judging a pumpkin-carving contest in her hometown. As for her most embarrassing fan encounter, Carly recalls, "This radio station got me to call a girl to surprise her. But her mom answered and didn’t realize her daughter had entered this contest, so was very suspicious about who I was and wouldn’t let me talk to her!"