Only thing we have on is the radio

from Rihanna (Ft. Drake) – What's My Name? Lyrics on Rap Genius

Meaning

No clothes, no pager, no mobiles (I dunno about you but I’m very doubtful about the latter)

Therefore the music that’s playing is the only thing on

This line isn’t purely Drake’s but an altered Marilyn Monroe quote:

“It’s not true, I had nothing on, I had the radio on"
Marilyn Monroe

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