It looks like Miley Cyrus and Demi Lovato are quickly realizing that they cannot be friends. Apparently the former Disney stars have two very different opinions about partying as one of them has become a "buzz kill."

According to Hollywood Life, the "Neon Lights" singer has become too much of a "goodie two-shoes" for the "Wrecking Ball" artist.

While Cyrus has promoted drugs and alcohol Lovato has struggled with substance abuse in the past and is currently in recovery.

The pink haired star often speaks out about the dangers of drug abuse and tries to help celebrity friends like Selena Gomez who have fallen on hard times and had stints in rehab.

A source revealed that Lovato's constant talk about being sober is the exact reason why Miley Cyrus no longer wants to hang out with her.

The insider explained, "Demi preaches her way through avoiding partying thanks to her past and Miley is all about it," adding, "Miley wants a friend and not a parent, and that is exactly the vibe Demi gives off. Miley thinks Demi is a literal buzz kill."

The source continued, "It is the ultimate oil and water situation between them both," adding, "They are not friends because Miley does everything Demi is against and Miley thinks Demi is no fun at all. So you can imagine how that would work out when they would be together."

What are your thoughts on Miley Cyrus and Demi Lovato ending their friendship? Let us know in the comment section below.