I am not sure, but I think that this reality show is "Operation Triumph", which is a talent show in form that is similar to Big Brother, but with upcoming singers. Anyway, I believe these ones come from Spain or a Spanish-speaking country, and there were occasions of group ticklings involving both male and female members, although the girls got the most of it (one in particular, as you can see from the videos):
YouTube watch?v=ZJkQAtcMuGM
YouTube /watch?v=FZW0Wnri1MA
YouTube watch?v=ndEt5lt6sw0
YouTube watch?v=ZJkQAtcMuGM
YouTube /watch?v=FZW0Wnri1MA
YouTube watch?v=ndEt5lt6sw0