Glee's Dianna Agron didn't exactly sing a wistful ballad following her split from actor Alex Pettyfer after nearly a year together.
PHOTOS: Biggest Hollywood splits
Since moving out of the L.A. home she and the I Am Number Four star shared about two weeks ago, Agron, 24, "is staying at a hotel under an alias" a source reveals in the new Us Weekly, out Wednesday.
Why the secrecy? Pettyfer, 20, has been "a psycho loose cannon" in the aftermath of the split, another insider says.
PHOTOS: Love lives of Glee's stars
On Feb. 18, according to an eyewitness, he got into a heated confrontation at a West Hollywood club with actor Sebastian Stan -- furiously accusing the Black Swan star of hooking up with Agron.
"Dianna is terrified of [Alex]," a pal explains, adding that he "absolutely lost it" and threatened Agron during a vicious phone chat. (Pettyfer's rep tells Us he made no threats.)
PHOTOS: See what Dianna and other Glee stars really looked like in high school
To read much more about the ugly breakup, pick up the new Us Weekly, out Wednesday.
Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly
Get the scoop on Bradley Bayou's dress design that Oprah wore to the Emmy Awards.
Jennifer Lopez reunites with Casper Smart, plus more famous friendly exes on Replay, hosted by Wonderwall's Jessica Wedemeyer.
Beyonce does her best to prove that her family life is just perfect on today's Celebs Gone Social.
Check out Kaley Cuoco's cutest canine-centric posts on social media on today's Celebs Gone Social.
Check out the sweet shots Jaime King, Mario Lopez, Snooki and more stars shared of their babies on today's Celebs Gone Social.
From Ariana Grande to Gwyneth Paltrow, get the romance rumors on Replay hosted by Wonderwall's Kirby Kristen.
© 2014 Microsoft