Haim’s most recent album, Women in Music, Part III, is arguably the pop album of the year. And one of the album’s very best songs is “3 am,” a slinky ode to “u up?”s accompanied by some of the band’s deepest, most melodic grooves. And their performance of the song on last night’s Late Night with Seth Meyers took the song to the next level. Exhibit A: They got Robert Pattinson to record the voice message that starts the song on the album. (This time it’s a video message, of course.) When he calls …