HIMYM theme, wait for it…song!
The How I Met Your Mother theme song, the one that goes “pa, pa, pa, pa…” is an excerpt (particularly the last part) from the song “Hey Beautiful” by the band The Solids. Carter Bays and Craig Thomas—creators of How I Met Your Mother, formed the The Solids in the summer of 1996.
Before “Hey Beautiful,” The Solids’ song “The Future Is Now” was the theme song for the series Oliver Beene.
Carter Bays is the lead singer and guitarist of The Solids, Craig Thomas is the drummer and backing vocals.
Listen (fast forward to 3:10 for HIMYM excerpt)
Cast sings theme song