The lyric is actually different. The official twitter account of the team Sagan Tosu talks a little bit about the song being there:
倖田來未さんが歌う「BRING IT ON !!」(受けて立つぞ、かかってこい！)と共にビッグフラッグが入場！サポーターの熱い声援と一緒にチーム の勝利を後押し！
https://twitter.com/saganofficial17/...80609809965056
And here it is a little message from Kumi about the song:
https://twitter.com/0056Momoka/statu...64142208667649
----
EDIT
This seems to be a gift from Kumi to the team, it's a big flag with her signature saying "BRING IT ON!!"
The full message is here, and also the lyric of the song with the modifications:
---
EDIT 2
Someone asked about Kumi's perfume line a couple of days ago, you can get them on Rakuten Global Market
http://global.rakuten.com/en/store/s..._browsehist_en
There are descriptions about each one of the perfumes (clearly translated by google), but just so you know LOVE CHARM is a unissex fragrance.