It was an advert (possibly, or at least similar to Dulux paint)
It had polka dots changing colours in the background
It had a really common tune, but is not https://www.youtube.com/watch?v=0_bx8bnCoiU
It IS however this: http://vocaroo.com/i/s194n8w6YfHY
HELP!
Never mind, it's The Popcorn Song
thank you #based /int/ for coing through