After breaking out three years ago as one of the best rated shows that Fox had on its slate, Glee is now in its fourth season on the network. Although ratings have dwindled in the past few years, there was never really any doubt that Fox would renew the show. Of course, that assumption turned out to be correct after the network confirmed that Glee would be returning for Season 5 and Season 6.
A large part of the show's success comes from the musical and iTunes sales, which factor into the profit for the network. Although ratings haven't exactly been consistent, it's still been a steady performer for Fox, which has definitely had its hits and misses over the last couple of years.
Fox's Entertainment Chairmen Kevin Reilly gave a statement about Glee's renewal, and said, "Glee debuted as the first and only successful musical comedy series on television, and more than four years later, it continues to defy genres, break new ground and have a significant impact on popular culture. Week in and week out, [creator] Ryan Murphy, Brad Falchuk, Ian Brennan, Dante DiLoreto and the entire Glee team deliver a series that not only delights and surprises fans, but also inspires them to talk about, share, debate and engage with the show — and I’m absolutely thrilled to have them on board for another two seasons."
Glee has definitely had a significant cultural significance, especially in pop culture and entertainment. The show's fourth season wraps up on Thursday, May 9th, and the fifth season will be debuting next year.