Not to be off-topic or something but I just saw this and it just melted my heart. Some fans were telling Katy that they can't get a ticket to the concert and Katy tells them to write down their names so that she can give them a bunch of tickets. Skip to 1:22.
Teenage Dream didn't leak until 6 days before release, so we're still 2 days away from beating that. Plenty of time for it to pop up.
Even then, do albums normally leak in Germany? I know it's uncommon for local UK acts albums to leak until it's released in Ireland. (And even then it's a struggle to find it online.. )