It doesn't matter why - it only matters that it actually happened and there is video evidence of it happening.
While out promoting his seksi & somber new flick, Blue Valentine, Ryan Gosling was asked by Peter Travers to sing the first song that popped into his head.
Thanks to his younger Blue co-star, Faith Wladyka, he busted out a few bars of My Little Pony.
It's music to everyone's ears!
Ch-ch-check out the adorbsness (above)!