Selena Gomez is reassuring her fans that there's nothing wrong with being a good girl.

During the Philadelphia stop of her Stars Dance tour, the brunette beauty told concertgoers that making the transition from squeaky-clean child star to adult songstress has definitely come with hurdles.

Just before singing her hit "Who Says," the 19-year-old explained that she's had to face endless criticism but isn't going to buckle under pressure.

"I get it all day, every day. I'm not sexy enough, or I'm not cool enough, or if I did this I would be accepted," she shared to the crowd of screaming devotees.

"Let me tell you one thing: The sexiest thing…is class."

Gomez's powerful message echoes Rashida Jones' Twitter rant aimed at other female celebrities.

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