Perrie out of Little Mix (for the month of December)

Little Mix's Perrie Edwards, 19, has canceled her December 2012 appearances with the group, due to a "recurring tonsil problem," according to a Little Mix spokesperson. On December 6, 2012, Edwards tweeted: "Getting your tonsils taken out sucks! #SORE Thanks for all the lovely messages & Im sorry to miss some of our gigs! Love u mixers Perrie."

The Little Mix spokesperson told The Sun: “Perrie is very disappointed to miss out. However, Leigh-Anne [Pinnock], Jade [Thirlwall] and Jesy [Nelson] do not want to let down the fans coming to see them so will perform at the upcoming shows, including Capital FM’s Jingle Bell Ball at the O2 this Saturday [December 8, 2012] without her until she is well enough to return.”

In 2011, Little Mix became the first group to win on "The X Factor" U.K.

However, her tonsil problem could be be a non-contagious problem that would not prevent her from socializing but would prevent her from singing.

Little Mix performed its first concert without Edwards at the radio station Key 103's Jingle Bell Ball in Manchester, England, on December 5, 2012. According to The Sun, "didn’t disappoint despite Perrie’s absence and made sure they still rocked the stage. Wearing their statement looks - baggy jeans, patterned tights and cropped tops - the girls gave it their all despite their missing bandmate."

Little Mix's Pinnock tweeted after the concert: "Performing at @key103 for the jingle ball was insane! So good to be back in Manchester! Loved it! :D x Leigh."

Little Mix has become an instant success in the U.K. and Ireland. The group's first post-"X Factor" single, a cover version of Damien Rice's "Cannonball," debuted at No. 1 in both countries. Little Mix's next single, "Wings," did the same.

Little Mix's first album, "DNA," debuted at No. 3 in the U.K., and so did the album's title track. The group has also had Top 10 hits in Australia with the "DNA" album and "Wings" single.