Via tokyohive:

It has been recently revealed that Nana Tanimura, who just released her infectious, uptempo new single, "TOXIC", worked with Korean composers for the two newly released tracks.

"TOXIC" was composed by PJ/Lee Jong Hoon, while "CIRCUS WORLD" was composed by none other than S.Tiger, producer for Korean music acts such as 4minute and BEAST!

The two tracks both have PVs, and they display Nana dancing along to choreography much more complicated than what she's put out before. S.TIGER, who composed the second track, "CIRCUS WORLD", was also responsible for 4minute's recent Japanese single, "FIRST". Nana wrote the entire lyrics for both tracks as well.

Check out the two PVs below! http://www.youtube.com/watch?v=nTF4zJz2Qts http://www.youtube.com/watch?v=s4IfP5PGKc0 Source: Uta-net