Actually, there are rumors going around Tokio Hotel forums and such that he was in a tattoo parlour earlier this month for a few hours. There isn't any actual proof that he has one yet, but if he did...
According to the professional tattoo artists in San Antonio, Texas, the correct answer is NO. The skin needs time to fully heal before it is touched up, worked on or added to. If there is not...
One of the most respected tattoo artists in the world, Anil Gupta, did not have tattoos during his career up until 2005, when he was tattooed by many of the finest artists in the world, in one day.