After giving birth to her second child in August, Christina Aguilera is currently busy getting ready to make her great comeback in 2015.

Aguilera took to her Twitter account on Tuesday to make an announcement about her upcoming return to the entertainment world. "New baby. New Music. New season of @NBAtheVoice. Bringing #FireAndFun to all, can't wait for 2015!" she wrote.

Ever since her tweet, fans have been wondering whether the mysterious hashtag "#FireAndFun" signifies the title of the pop star's new single or the follow-up to her 2012 seventh studio album "Lotus" in the new year.

In addition, it was announced on the same day that the "Genie in a Bottle" hitmaker will be returning for season eight of NBC's reality singing competition series "The Voice," alongside Pharrell Williams, as well as veteran coaches Adam Levine and Blake Shelton.

Christina Aguilera had to be replaced by fellow blonde singers Shakira and Gwen Stefani, since she had to take a maternity leave for her baby daughter Summer Rain Rutler.

"We are excited to welcome Christina back to her red chair and can't wait to see how she mixes things up among Adam, Blake and Pharrell, in what will be an incredibly competitive competition," said Paul Telegdy, president, alternative and late night programming, NBC Entertainment, in a statement via Hollywood Reporter. "These four talented artists are at the top of their game as musicians and as coaches. The mentoring is sure to be intense and the stakes will be high."

Carson Daly then made the announcement official on the "Today" show: