What song has the lyrics mama was a hippie?

The song that contains the lyrics "mama was a hippie" is "I Gotta Feeling" by The Black Eyed Peas. The song was released in 2009 and became a global hit, topping charts in numerous countries. The lyrics in question appear in the chorus of the song, which goes as follows:

Yeah

Mamas got me trippin'

Yeah

Her little mama was a hippie

Yeah

And the feelin' good

Like I know that mama should be

She's so pretty

Pretty, ooh pretty