Ever wonder what Cyndi Lauper’s greatest hits would sound like if they were sung by Family Guy“s Peter Griffin and diabolical son Stewie?

Wonder no more! Seth MacFarlane provided the answer to that musical question in last night’s edition of The Graham Norton Show when the Ted director/star broke out his Stewie Griffin voice to tackle “Time After Time”; — with Cyndi Lauper cracking up right next to him.

But that was just a warm-up; next came Peter Griffin putting his unique Quahog spin on “True Colours,”; a performance that needs to be seen to be appreciated:

The music continued when Seth enlisted Ted 2 co-star mark Wahlberg for a duet of the Thunder Buddy theme song — but be forewarned that some of the language is decidedly NSFW:

You can catch Family Guy Sundays at 10 p.m. ET/PT on Global.