Thomas Karaoglan (born 20 March 1993 in Duisburg) known professionally as Der Checker is a German singer from the label Ariola.

He became popular from participating in the German casting show Deutschland sucht den Superstar, where he reached fifth place.

[2] Karaoglan stated that he "make crap music"[2] and started to design jewelry with Harald Glööckler.

[2] Karaoglan was charged with two counts of sexually abusing a 12-year-old boy in Münster, North Rhine-Westphalia.

On 7 March 2013 the charges were downgraded to insult on a sexual basis and Karagolan was ordered to pay the boy €5000 after Karaoglan admitted kissing him on the cheek.