It was all to celebrate the talk show host's birthday. According to GossipCop.com, Justin didn't perform but did sit down for an intimate chat.
The Biebs chatting with Ellen about his infamous Calvin Klein ads and upcoming Comedy Central Roast. He even flashed back to his badboy days.
Shortly after his visit, he tweeted the birthday girl. "Good seeing u today @TheEllenShow. Happy birthday! Sorry I was so nervous," he posted.
She responded with a photo saying, "I can't believe the surprise I got for my birthday show. Then I saw his face. Now I'm a Belieber."
They say Justin looked really healthy and happy to be on the show while there. Yay, Biebs! His specific Ellen Show episode will air on Thursday.