Here's an old video from a girls aloud tour, Cheryl is waving her arms in the air and Sarah gives her a quick tickle under her arm at the 29 second mark, unfortunately there is not much reaction, much like when she was tickled on some radio show so I think she's just not that ticklish, any way judge for yourselves
https:// www.youtube.com/watch?v=NGBfszrtyE0
https:// www.youtube.com/watch?v=NGBfszrtyE0



