Mesut Ozil has spilled the beans on his Arsenal teammate Petr Cech by revealing the bizarre way he once "shocked" the German.
Now many Gunners fans will know that the 35-year-old Czech shot-stopper is a man of many talents, as the above video shows.
But according to Ozil, these talents know no limits.
In a recent interview with Arsenal Player, the Gunners playmaker spoke about Cech's initiation at the club, immediately after he moved across London from Chelsea.
"Honestly, Petr fascinated me once," explained Ozil.
"You know as a young or new player, you have to stand in front of the team. When it was Petr's turn, he just started to rap about all of us and the training staff.
"Everyone was shocked because of how good it was. In terms of the best voice, I'd go with Shkodran Mustafi.
"He sang a Justin Bieber song, I don't know which one, but it wasn't bad.
"I sang something which nobody could understand. You have to get up in front of the team and they're cheering you, but they don't know what you're singing.
"Even if you were having a go at them, they'd still celebrate you!"