Love Bananarama's Cruel Summer and recently tried my version on my daughter's marimba.
The Bangles - while I didn't care much for Walk Like and Egyptian - I still think "Hazy Shade of Winter" is one of the best covers ever and even had the 45 of that song. Plus Suzanna Hoffs was hot.
But had to go with the Go-Gos - we'd warm up to "We Got the Beat" by our pep band playing HS ball, and it's firmly implanted in my memory - Head over Heals and Our Lips are Sealed are right there - they just had bigger hits IMO.