Justin Bieber is now in stable condition having suffering a concussion after he reportedly ran into a glass wall during a concert in Paris. Bieber, 18, had been performing in Paris when he walked off stage in between songs and hit the glass, according to TMZ, who spoke with the pop star. Bieber then returned to the stage and finished his set, the site reports. The ‘Baby’ singer then returned to his dressing room, where he tells TMZ that he passed out for about 15 seconds. Doctors reportedly said that Bieber suffered a concussion, but will be fine. He later posted on Twitter: “i will see u again Glass. I will have my revenge. BIEBER vs GLASS. MGM LAS VEGAS 2013. lol. #GottaLaughAtYourself,” he tweeted. Bieber, who made headlines earlier this week for a tussle with a paparazzo, had a similar run-in with a glass revolving door in 2010. Controversy surrounded his free concert in Oslo, where police reportedly threatened a state of emergency and appealed to the singer for help in controlling his followers.