After his side won their seventh league title, their first since 2002, with a 2-0 home win against Nuremberg, Grosskreutz, 22, allowed Brazilian team-mate Dede to shave his head on the pitch in front of 80,000 fans.
"I'm happy, I've never had my hair so long," said German international Grosskreutz as his side celebrated at their Signal Iduna Park stadium with the traditional beer showers.
"When I think back that three years ago I was still in the stands among the spectators and now we are German champions."
Short link: