It's Teen Mom 3's Alexandria Sekella!
Did you know that Alexandria was such an accomplished dancer? "Just stretching it out," she recently posted on Instagram, demonstrating a move called an arabesque. You know, NBD.
Teen Mom 3 will also feature a professional cheerleader named Mackenzie Douthit, who loves showing off her fancy flexibility skills. Hmmm … we spell a rivalry! So You Think You Can Dance, Teen Mom Edition anyone?!
Were you able to guess Alexandria's identity? Tell us below and click here to play more "Guess Who."