It seems that Britney Spears is doing good and looking good. The singer has made her appearance Saturday, at Jenny McCarthy and Jim Carrey's fundraiser for Generation Rescue and she shocked everybody, but in a good way.

Britney Spears “looked great and seemed really happy,” a person who was at the party told People magazine.

While at the fundraiser, Britney was quiet most of the time and she “smiled and clapped during the video about autism,” the witness told People magazine. At the event were also Hugh Hefner and the three Girls Next Door (Kelly Madison, Kendra Wilkinson and Bridget Marquardt), as well as Charlie Sheen with Brooke Mueller and Robert Rodriguez with Rose McGowan.

Generation Rescue is dedicated to researching autism, attempting to “share the truth with families about the potential cause of their child’s Neurological Disorders so they can focus on effective treatments.”

The singer gave up her custody fight, but she gets to spend more time with her two sons. She reached a custody agreement with ex-husband Kevin Federline and she will get three visits a week, including two overnights, from her two sons, Sean Preston, 2 and a half years old, and Jayden James, aged 1 year and a half. Britney also has to pay Federline $20,000 a month in child support.

Britney will spend her summer in the recording studio as “she's working with a team of top-notch producers and songwriters.”

“We’re very excited about what she's accomplished so far,” her manager, Larry Rudolph, and Jive records said in a statement, according to ABC News.