dont
I think you are referring to "My Sharona." This was a big top-40 hit in 1979, and the group that sang it was The Knack.
To have a knack for/of something means to be particularly good at it e.g. "He has a knack for scoring important goals" See Richard Lester's film 'The Knack...And How To Get It' - one of the male leads is successful with women (he has 'the knack'), while the other male lead is nervy around women (he needs to get 'the knack' so he is more confident around women)
Katy Perry sang the song
hot girls of course!
The Intruders
Donna Summers sings "Bad Girls".
"The girls sang" is the past tense.
A knack is a talent for something. Here are some sentences.He's got a real knack for painting.I wish I had the knack of gardening.Constructing furniture takes a knack.
sang by the group SNSD otherwise knowed as Girls' generation
The Weather Girls
The Bodysnatchers
you sang good in the concert