Fletcher has written or co-written ten UK number-one singles: "Crashed the Wedding", "Who's David?", and "Thunderbirds" for Busted; and "Five Colours in Her Hair", "Obviously", "All About You," "I'll Be OK", "Please, Please", "Star Girl", and "Transylvania" for McFly. He co-wrote eight of the songs on "A Present for Everyone", as well as all but one ("Not Alone", written by Jones) of the tracks on McFly's debut album, "Room on the 3rd Floor". He is the primary writer on the majority of tracks on all five of the band's albums. Of McFly's four members, he has "the most songwriting credits and therefore the most money".