<Ul> <Li> `` How Long Has This Been Going On ? '' , a 1927 song by George and Ira Gershwin </Li> <Li> How Long Has This Been Going On ? ( Sarah Vaughan album ) , a 1978 album </Li> <Li> How Long Has This Been Going On ( Van Morrison album ) , a 1996 album with Georgie Fame and Friends </Li> <Li> `` How Long '' ( Ace song ) , 1974 </Li> <Li> `` How Long '' ( Charlie Puth song ) , 2017 </Li> </Ul>
who sings how long has it been going on
George and Ira Gershwin Sarah Vaughan Van Morrison