Two beloved television stars in crisis. The grown-up "Nickelodeon" star seeking help at a health facility, just a few months after her comeback. And, Luke Perry after his reported stroke. ET's Kevin Frazier reports from the hospital with the latest on the condition of the "Riverdale" and "90210" star. Then, Khole Kardashian comes out swinging. The woman accused of hooking up with her man tells her side of the story. Plus, the battle of the "Boy Bands" is on. "The Jonas Brothers" and "New Kids On The Block" drop brand new music videos and only ET has the inside scoop on the best cameos. Entertainment begins and Ends with ET.