Waluigi's favorite genre is female R&B groups. Destiny's Child is a regular artist in his playlist (his favorite song is Survivor, it's pretty inspiring for him). He also listens to The 411, Jennifer Lopz, Ciara, and Mariah Carey. He's proud of this fact, but Nintendo doesn't want to let you know this. Luigi loves girl pop bands (like Waluigi). Dua Lipa, Shakira, Beyonce, Katy Perry, Lady Gaga, Britney Spears, Mis-Teeq, and so much more are in his playlists. Luigi would love to hang a Katy Perry poster in his room.
Mario also loves these songs and dances to them, buuuuut he doesn't want you to know this, it's a guilty pleasure. He'll be pretty embarrassed, but he can't help himself if Lady Gaga's Applause comes on.
Wario loves all that music, but pitch-shifted down by like 50 percent. He loves all sorts of music pitch-shifted down, especially Youngblood Brass Band's Brooklyn. He's a terrible dancer with a gracefulness of a tuba, whose expertise is in interpretive dance with his stubby legs, but he'll enjoy it all the same.
Bowser really hates the songs. Can't stand them. It's for puny girly wimps, unlike brutal metal. Or at least, that's what he says. He enjoys them all the same, thanks through exposure of Peach's music players, but in absolute secrecy. This is why he stole the Music Keys, after all. Catch him swaying the pelvis to it, he's gonna have to banish you to World 8-3, where you'll have to dance to cross a river of lava. No one has made it past that, because if they did you would've heard about it officially on Twitter dot com.
