J-pop girl group Morning Musume (now Morning Musume '14) have topped the Japanese Oricon charts with their new single (it features 3 songs) "Egao no Kimi wa Taiyou sa / Kimi no Kawari wa Iyashinai / What is LOVE?" and it's the 4th consecutive single by them to do so. It's also their 55th single to ever rank in the top 10!
It probably helps that two of the songs on the Triple A side single were used as syncs for TV ads: "Kimi no Kawari wa Iyashinai" is the official support song for the Japan's team for Sochi Olympics and "What is LOVE?" was used as the ending theme song for NHK World TV and TV Japan's "J-MELO" (a weekly Japanese music television program) from Oct-Dec in 2013.
The leader of the group, Michishige Sayumi commented,
"This is the first time for us to top the chart for 4 consecutive times in our history! I'm full of indescribable joy, and gratitude. This is the year for Morning Musume '14 to make things happen! I think that all we should do is to believe in what we have done until now, and to run at full speed while looking only forward. That's all we are doing this year!!"