Green Day's Billie Joe Armstrong enters rehab for substance abuse.

+ Green Day announced frontman Billie Joe Armstrong is "seeking treatment for substance abuse" on their Facebook page last night. This comes on the heels of Billie's reportedly erratic behavior during their set at iHeartRadio Music Festival in Las Vegas on Friday. (MTV News)

+ Several performers rocked iHeartRadio Music Festival over the weekend. Watch Taylor Swift, Pink, Usher and more from Saturday's lineup and also check out several songs from Rihanna, No Doubt, Psy, Lil Wayne and more Friday night. (Idolator)

+ Also watch Mary J. Blige and surprise guest Prince (!!) perform his song "Nothing Compares 2 U" (made popular by Sinéad O'Connor) on the last night of iHeartRadio Music Festival. #ZOMG (Rap-Up)

+ The 2012 Emmy Awards took place last night. Watch Josh Groban pay tribute to host Jimmy Kimmel with One Direction's "What Makes You Beautiful." Yes, it's as hilariously awesome as it sounds. (Just Jared)

+ While One Direction were covered at the Emmys, they're also starring in a comic book. It's part of the FAME comic book line. (Idolator)

+ You guys, The Jonas Brothers revealed they'll be dropping a new track soon. Nick told MTV News that "we're days, if not hours away from choosing a single so it's very exciting...We're excited to get the music out there for our fans." (MTV News)

+ Listen to Justin Bieber performing an acoustic version of "As Long As You Love Me," complete with him rapping Big Sean's verse. (Idolator)

Photo credit: Felisha Tolentino