Should BGC4 Have A New Theme Song?

For those who have just became fans of the show (S3 was the first season they have ever watched) should know that Bad Girls by Tokyo Diva is not the original theme song. When S1 aired in 06' their first theme song was Love Me Or Hate Me by Lady Sovereign but was quickly changed by the second season. Months before production started casting, fans have been discussing on the message boards about a possible new song for S4 since "Bad Girls" have been going on for two seasons.

So tell me, should BGC4 have a new theme song? and if so, do you have any suggestions?