1. Bruce Willis
https://www.youtube.com/watch?v=gH2zJfK0B0Q Bruce Willis' musical career began with the infamous 1987 R&B album The Return of Bruno, which enjoyed moderate success and scored single Under the Boardwalk a #2 slot in the UK charts. Produced alongside the album was an HBO special of the same name, a mockumentary in which Willis played the titular alter-ego, and while the VHS cover art refers to it as "a hilarious comedic rock fantasy", it's really only funny for all the wrong reasons. Willis knocked out one more album and a dubious best-of "Masters Collection", while also contributing songs to movies Moonlighting, Hudson Hawk and... Rugrats Go Wild, though the Die Hard star has thankfully focused more on his movie projects over the last decade (even if this did result in the dire A Good Day to Die Hard). Furthermore, Bruce's
painful appearance on The One Show suggests Bruno is probably a part of his career he'd rather leave behind him.
Are there any other actors who tried (and hilariously failed) to make it as a musician? Shout it out in the comments!