Question: Glee performed on which other show during December of 2010?
About the article "Glee (TV series)", section "Promotion".

Candidate passages:
"Don't Stop Believin'" was part of the setlist of Glee Cast's worldwide 2010/11 concert tour, Glee Live!
In Concert!
On April 7, 2010, Glee Cast performed the song on the "The Oprah Winfrey Show".
On April 13, 2010, Glee Cast performed the song on the "2010 White House Easter Egg Roll", along with "National Anthem", "True Colors", "Somebody to Love", "Over the Rainbow", "Home" and "Sweet Caroline".
On December 5, 2010, Glee Cast performed the song on the UK version of the "The X Factor". 
"The LXD" has performed live for YouTube Live '08 and for the TBS Ellen DeGeneres special "Ellen's Even Bigger Really Big Show" at Caesar's Palace.
In May 2010, they were the opening act for the "Glee Live!"
tour.
They performed by invitation on season six of "So You Think You Can Dance", the 2010 TED conference, and the 82nd Academy Awards.
In October 2010, the LXD performed at YouTube Play in New York.
In December 2010, they performed on the "Conan" show.
In 2011, they joined the cast of "Glee" again on their second international tour. 
The theatrical trailer was attached to screenings of "Step Up 3D" and "Easy A".
The first TV spot premiered during the season 2 premiere of Fox's "Glee" on September 21, 2010.
A third TV spot also aired the following day during "Dancing with the Stars", later followed by another during MTV's "Jersey Shore".
Several teasers have been released for promotional purposes including the Etta James's "Something's Got a Hold on Me".
This was then followed by the track "But I Am a Good Girl" which was released in November 2010.
Aguilera performed "Bound to You" on "The Tonight Show with Jay Leno" and gave an interview and performance on "Conan".
Aguilera also gave an interview to show host Chelsea Handler to discuss the film and other subjects.
On November 19, 2010, Aguilera also gave a television interview to Ellen DeGeneres.
She then performed a track from the soundtrack, the Etta James track "Something's Got a Hold on Me".
Aguilera performed "Express" at the American Music Awards of 2010 and "Show Me How You Burlesque" at the "Dancing with the Stars" finale.
She also performed "Express" on the final of the seventh series of "The X Factor" which received criticism and complaints for the raunchy content. 
Finn Hudson is a fictional character from the Fox musical comedy-drama series "Glee".
The character was portrayed by Cory Monteith and appears in "Glee" starting with its pilot episode, first broadcast on May 19, 2009.
Finn was developed by "Glee" creators Ryan Murphy, Brad Falchuk and Ian Brennan.
"Glee" follows the trials of the New Directions glee club at the fictional William McKinley High School in the town of Lima, Ohio.
Finn is initially the quarterback of his high school football team.
A popular jock at the top of the school’s social hierarchy, when he finds himself forced to join the school's glee club, he discovers that he loves it, although he risks alienation from his friends by remaining a member.
His storylines see him struggle with his decision to stay in the club, which is at the bottom of the social ladder, while he maintains his popular reputation and the respect of the other jocks.
The character has dealt with his attraction to both head cheerleader Quinn Fabray (Dianna Agron) and glee club star singer Rachel Berry (Lea Michele), the series' female lead.
Following Monteith's death on July 13, 2013, it was announced that Finn's own death would occur in the third episode of the fifth season, titled "The Quarterback".
Monteith felt that Finn has had to grow up a lot during his time on the show.
The actor said, "Finn started off as the stereotypical dumb jock but as the show has gone on, Finn’s not dumb anymore, really, he’s just a little naïve."
Early reviews of Finn from television critics were mixed; Todd VanDerWerff of "The A.V.
Club" said that he and Michele were "both agreeable and a little desperate for an outlet" in the pilot episode.
Commenting on the fifth episode of the first season, Eric Goldman of "IGN" wrote, "We got to see a bit of a darker side to Finn [...] it's good to see this, because up until now, Finn's been a bit too straight-laced to totally invest in."
In the second season's eighth episode, "Furt", "Entertainment Weekly" Tim Stack said, "It's been a while since we’ve gotten some Finn focus, and I think I just missed Cory Monteith.
But I also forgot what a good, natural actor he can be."
Monteith as Finn won the 2011 Teen Choice Award for Choice TV: Actor Comedy, and was nominated in the same category in 2010.
Although he was not a singer before being cast as Finn, Monteith sang lead or joint lead on a large number of songs on the show, most of which have charted in the US and abroad.
"Jessie's Girl", which Finn performed as a solo, was certified gold in Australia, one of only three singles to do so from the show's releases in that country; he was joint lead on "Don't Stop Believin' in the pilot episode, the show's first single sung by the glee club, which was certified gold and platinum in Australia and the US. 
As a young boy, Larsen played drums, bass, guitar and keyboards.
He graduated from Murrieta Valley High School in 2009, and he was in the school's marching band.
In sophomore year, he became vocalist and guitarist of the school band "15 North" and the band performed in festivals.
Larsen was also a model for Jac Vanek clothing and accessories.
In 2010, Larsen auditioned in season 9 of "American Idol" but was cut after making it to Hollywood, failing to make it to the semi finals.
After doing some runway modeling for fashion designer Ashton Michael, he met his soon-to-be band-mate Skip Arnold during a runway show, moved to Los Angeles busking and applied to "The Glee Project".
Meanwhile Larsen and Skip Arnold formed the band "Bridges I Burn" and soon a third member, Salvatore Spinelli, joined them.
Larsen writes and performs most of his music.
He auditioned for the role of Sam Evans on "Glee" but didn't get the part, which ultimately went to Chord Overstreet.
His first "Glee" appearance was on the thirteenth episode of the third season, titled "Heart", as Joe Hart, a formerly home-schooled Christian.
During that episode he performed in two songs: Gym Class Heroes' "Stereo Hearts", and a mashup of The Association's "Cherish" and Madonna's "Cherish".
Although his prize for having won "The Glee Project" was seven episodes, he appeared in each of the final ten episodes of "Glee" third season.
In addition, he has subsequently appeared as a mentor for "The Glee Project" second season, and has appeared in 12 episodes in "Glee" fourth season.