The Bring it On star is spearheading efforts to build a recovery centre for former child soldiers in Uganda, and she asked friends and family to make donations to the cause instead of buying her expensive presents.
Her loved ones and fans rallied round to help her reach her goal - and she was left overwhelmed when the target was reached in just a few days.
In a series of posts on her Twitter.com page, she writes, "Good morning, angels - thank u for my 30th birthday wish! this is beyond me... THANK U... EVERYONE - WHOO-HOOO!"