TL; DR In the remixed version of the song “despacito”, Justin Bieber sings in Spanish. Some articles online criticize his pronunciation. I analyzed his realization of “p” and “t” in Praat and find that, while his pronunciation is not perfect, it is pretty good. I don’t believe he commits the “errors” suggested in the article.
Overview I recently heard the song despacito featuring teen hero Justin Bieber (my wife mentioned to me that he sings in Spanish and my curiosity got the best of me).