According to RadarOnline.com, the two stars are battling for the same guy!
Jen reportedly wants to have full control over their shared hairstylist Chris McMillan and wants him to focus solely on her 'do.
"Miley has radically remade her look with the help of handpicked hairdresser Chris, but the successful creative collaboration between the pair is headed for splitsville because of Jen," a source close to the situation told Radar.
Chris is the one who came up with Jen's "The Rachel" hair back in her Friends era and because she has two movies coming out in 2014, she wants him to focus on a new look for her.
"Jen has gotten very impatient with Chris' constant attention to Miley - as well as the fact that Miley's hair is getting so many headlines," the source added.
"Jen wants Chris to lay off Miley for a while. It's become an ultimatum. She has been dissatisfied with the situation for a long time, and things seem to have reached a breaking point."
Whoa! How do you think Chris will handle this situation? How would you? We highly doubt he's going to ditch Miley, especially after how popular her signature 'do is now but then again how can he get rid of Jen, the one who put him on the mane map? What do yo think? Who should he pick? Should he have to? Chime in!