Pretty much every single rapper in existance.

Te Amo before Rated R, Hatin on the Club, Whippin My Hair.
It's really nothing new.

Idk, how do you guys know? But I guess Nicki's remixes to Singles Ladies and Sweet Dreams have been played at least a few times since so much people know them. Oh and do mixtape songs count? Cause I Get Crazy went Top 20 on Hot Rap Songs and even has a Wikipedia-page: http://en.wikipedia.org/wiki/I_Get_Crazy (Slay a bitT.)

Yes. Lana's leaks are legendary.

Ops forgot to include Turning Tables and I'll Be Waiting into the mix as unreleased singles.

How did Te Amo even leak? That never happens with Rih.

!

Been there done that.

Yes, all the "Blackout" demos. Sometimes they even play the "Cold As Fire" demo on television (in the background of some news) and you can hear the tag.

How about a real Demo being everywhere just by her name back in 09...

yes, i remember radios playing PArt of me's demo a week before its official release. and once it was released they still kept playing the demo

So as unreleased tracks Adele has Turning Tables which was played on Top 40. I'll Be Waiting which was played on Triple A and I also found out Adele's cover of "Lovesong" also received airplay putting it #18 on Jazz songs. Then again I think Adele did some radio promo or w/e so alot of her songs were played on radio O_O

Multiple times, actually.

If we're including album tracks, the Tom Ford by Jay-Z is currently in the top 50 on both rhythmic and urban. Pop girls never seem to get album tracks going top 50 on any radio formats, apart from Rihanna and Beyonce.

I think some radio stations were playing the POM demo right before the final version was released.

Nicki went Top 20 on Urban radio with a mixtape song though.

how is that legal?

Te Amo and it went to #1 in Brazil for several weeks without being finished nor there was an album aanouncement at the time nor anything, could your faves?