Starflyer 59 - "Happy Days Are Here Again" (cover)
The album Silver by Starflyer 59 is one of my all-time favorites. Definitely recommend checking it out if you're into 90s alternative/shoegaze music.
Original lyrics:
"Happy days are here again
And you're not
'Cause when she smiles
It shakes my sickest face
And again, and again, and again
'Cause when she smiles
It shakes my sickest face"