Once again, celebs have come together for a good cause!  This time, Kim Kardashian, Kourtney Kardashian and Khloe Kardashian have joined Demi Lovato in an anti-bullying rally filmed at the Jimmy Kimmel Show as part of Extreme Makeover: Home Edition.

The rally was to benefit the Walker family, whose 11-year-old son hung himself after being bullied.  The event included a mini-concert by Lovato and the stars gave several surprises to the family, all of which will be revealed when the Extreme Makeover episode airs.

Christmas is slowly making its way here and you know what that means – Z100 Jingle Ball concert is coming up! And with the help of Demi Lovato, the radio station announced the line-up for the big, festive show!

You little monsters better get in line now to pick up your tickets because Lady Gaga is headlining the big show on December 9 in New York City’s Madison Square Garden! But she’s not the only one involved in the show this year.

Demi Lovato had more to deal with than her eating disorder and self-harming when she entered a treatment facility late last year. The "Skyscraper" singer recently revealed that she actually suffered a near-panic attack when she first registered for treatment.

"I have social anxiety issues when it comes to girls my age because I dealt with bullying."

Read on to hear more.