Top 10 artistes with the most TV CM exposure in the Kanto region for the first half of 2013 (Video Research)

Note that the time in the brackets indicate the amount of time they appeared in CMs during the first half of 2013:

1) Gouriki Ayame (47 hours 46 minutes and 45 seconds)
2) Ueto Aya (37 hours 26 minutes and 30 seconds)
3) Takei Emi (29 hours 42 minutes and 45 seconds)
4) Morisanchuu (28 hours 51 minutes and 30 seconds)
5) Igawa Haruka (28 hours 24 minutes and 30 seconds)
6) Maeda Oushiro (26 hours 49 minutes and 15 seconds)
7) Shinoda Mariko (26 hours 44 minutes and 30 seconds)
8) Takada Junji (26 hours 6 minutes and 45 seconds)
9) Maeda Atsuko (26 hours and 4 mins)
10) Oshima Yuko (24 hours 56 minutes and 45 seconds)

Source: Video Research / Sponichi