A few times on Finnair (OSL-HEL and return), Finnair have annoyed the hell out of me with their "boarding music" being on from boarding until the seatbelt signs are turned off. It's about 3-4 songs, all unknown to me, being played on repeat, relatively loud. Especially on one sector HEL-OSL, we were delayed from the stand for some reason and I believe we heard every tune 3-4 times, it did not f-ing stop until the cabin service began. Incredibly annoying.