Well most know of the story behind "Come and Get It" but for those who don't. Paul was waiting for the other 3 to get into the studio and I guess he got impatient so he had this tune to lay down and in 20 minutes recorded it. Drums, bass, piano, guitar, vocals and gave it to Badfinger who where in the studio at the time.
Said something like, this is a hit if do it exactly like this. So with Paul producing, the did do an almost exact version of it and it did become a hit which led onto it and the album it was on to be the soundtrack of Ringo's movie of the same name, "Magic Christian".
I've got a chezzy Badfinger page I did years ago that is still up:http://www.interpc.ca/badfinger