Timeless songs

You know the songs... The ones that will come on at a party or BBQ and everyone, regardless of age, will know the words and/or the dance. I went to my kids school disco last year and was surprised to see kids (and parents) flock to the dancefloor when they played Nutbush and the Macarena.

It had me wondering - what songs are coming out now that you think in 20-30 years will still be popular party songs (regardless of whether or not you actually like them)