Fake name

‘Hall of Fame” Group Recorded Under An ‘Alias’
‘Hall of Fame” Group Recorded Under An ‘Alias’
‘Hall of Fame” Group Recorded Under An ‘Alias’
It was November of 1965 and this group had already laid the groundwork on it's way to the Rock & Roll Hall of Fame. At the time they had already amassed 20 Top 40 hits, four #1's and three gold records. To test their their success, they decided to record a song under a different name. Pictured is the 45rpm record that they released as The Wonder Who, can you identify this group?