Bruno can literally go from singing a ballad song with nobody else but him on the stage to singing an upbeat song while dancing with his band members. And the retro style is the theme of his second album. And he's one of most versatile artists out there.
Nothin' on You: pop/hip hop
Billionaire: Reggae fusion, pop rap
Just the Way You Are/Grenade : R&B, pop
The Lazy Song: Roots reggae, pop, R&B
Locked Out of Heaven: New wave, funk
When I Was Your Man: Soul, pop
Treasure: Disco
Whereas Katy perry.
I Kissed a Girl: Electronic pop/ Dance-pop
Hot n Cold: electropop/ Dance-pop
Waking Up in Vegas: Dance-pop
California Gurls: electronic pop/Dance-pop
Teenage Dream: electronic pop/Dance-pop
E.T: Electronic
Part of Me : Dance-pop
Wide Awake: Mid-tempo/ Electronic
The only song she released which was somehow different is Thinking of You and it flopped.
I Kissed A Girl is not Electronic Pop/Dance-Pop It's more Pop Rock tbh.
It's more Pop Rock tbh.