2. Amanda Bynes
Amanda Bynes' crazy Twitter outbursts suggested that there was a storm brewing. She implied that Rihanna was beaten up by then boyfriend, Chris Brown, for being 'too ugly' and then went on an 'ugly' hate campaign, slating everyone from Jenny McCarthy to Miley Cyrus and Drake. She shot to fame on the Nickelodeon series All That and The Amanda Show, but at the age of 27, after a series of bizarre outbursts, the actress was placed under an involuntary psychiatric hold in July this year. She has allegedly being diagnosed with schizophrenia and bipolar disorder, but it seems she could be on the road to recovery after reports suggest she will be allowed out of rehab twice a week for supervised outings. There was also the infamous arrest for DUI, however let's hope that this time Amanda is on the road to recovery.