Replacing one bad apple for another?
Selena Gomez, 21- who dumped troubled ex Justin Bieber, 20, last month after she caught him texting her now-nemesis Kylie Jenner, 16- posted a selfie with British model-of-the-moment Cara Delevingne, 21, and Bradley Cooper fashionista girlfriend Suki Waterhouse, 22, at pop star Katy Perry's London concert May 31.
"This is how we do, da do," Gomez captioned the Instagram photo, quoting Perry's lyrics from her tune "This Is How We Do."
But Gomez- who checked out of rehab in January after just a two-week stint- may not be picking her new pals wisely.
Notorious party girl Delevingne was caught on camera dropping a bag of unknown white powder last spring, and notoriously shared a booze-filled romance with Fast & Furious 6 actress Michelle Rodriguez, 36, earlier this year.
Hopefully, Gomez has kept her down-to-earth buds close: As RadarOnline.com previously reported, Gomez had recently reconnected with her pre-Bieber girlfriends, including Secret Life of the American Teenager actress Francia Raisa, 25.
"Her old friends are thrilled to have her back in their lives and back in the groove of things," a source told Radar. "She didn't bring up the sudden change in her group of friends, but seemed like her old self."
Should Selena stay away from Cara? Sound off in the comments.