Last week marks the biggest sales week for Glee music since the show's inception with an astounding 880,000 songs downloaded.  This outstanding feat resulted in seven Glee tracks occupying the iTunes Top Songs chart simultaneously.

To date almost 24 million Glee songs have been digitally downloaded, with nearly 9 million albums sold worldwide. Glee scored three consecutive #1 releases with Glee: The Music, Volume 3 Showstoppers, Glee: The Music, The Power of Madonna andGlee: The Music, Journey To Regionals.  The RIAA has certified Glee: The Music, Volume 1 Platinum (sales in excess of 1 million units) as well as Glee: The Music, Volume 2 and Glee: The Music, Volume 3 Gold (sales in excess of 500,000 units).  

The full track listing for Glee: The Music, Volume 5 is as follows:

1. Thriller/Heads Will Roll
2. Need You Now
3. She's Not There
4. Fat Bottomed Girls
5. P.Y.T. (Pretty Young Thing)
6. Firework
7. Baby
8. Somebody To Love
9. Take Me or Leave Me
10. Sing
11. Don't You Want Me
12. Do You Wanna Touch Me (Oh Yeah)
13. Kiss
14. Landslide
15. Get It Right
16. Loser Like Me

About Columbia Records: One of the most respected and successful record labels in the world, Columbia Records is home to established superstars and exciting new talent. Columbia Records is a wholly-owned subsidiary of Sony Music Entertainment.

Sony Music Entertainment is a global recorded music company with a roster of current artists that includes a broad array of both local artists and international superstars. The company boasts a vast catalog that comprises some of the most important recordings in history. Sony Music Entertainment is a wholly owned subsidiary of Sony Corporation of America.

Twentieth Century Fox Television, a division of News Corp., is a leading supplier of entertainment content domestically and around the world.

Fox Broadcasting Company (FOX) is a unit of News Corporation and the leading broadcast television network among Adults 18-49. FOX finished the 2008-2009 season at No. 1 for the fifth consecutive year – a feat that hasn't been achieved since the mid-1990s – while continuing to dominate all network competition in the more targeted Adults 18-34 and Teen demographics.

SOURCE Columbia Records

Thanks to the latest episode’s six new songs, which includes a cover of Lady Antebellum’s ‘Need You Now,’ the FOX show now has 113 tracks on the chart as opposed to The King’s 108. The Beatles have a mere 107.

Since its debut in 2009, ‘Glee’ has racked up more than 16 million downloads and has been nominated for two Grammys.

Watch Lea Michele and Cory Monteith perform ‘Need You Now’ on 'Glee' here:

The tracks performed during the episode were 'Baby', which was sung by newcomer Sam (played by Chord Overstreet) to Quinn Fabray, and 'Somebody To Love', which was tackled by the male cast as a whole. 

This marks the first time Bieber's music has been featured on the popular television series after its creator Ryan Murphy recently revealed that there wouldn't be a whole episode dedicated to the young star as "those are reserved for artists with a big catalogue, ala Madonna and Britney, etc."

Bieber said of the Glee covers:

"we just gotta work on those moves @chordoverstreet . yeah i heard about u guys doing the songs on #GLEE 2nite. Im honored. KILL IT!"

Bieber's level of success is ever-expanding after he won a BRIT award at last night's ceremony for International Breakthrough Act. Watch the Glee cast's Sam perform 'Baby' below:

“I would love to do ‘Glee,’” the singer told PopEater.com. “I met the cast in London and they seemed really cool. It would be a great experience.”

Cee Lo’s hit song ‘Forget You’ has already been covered on the FOX show, by Gwyneth Paltrow, who performed the song with him at last weekend’s Grammys.

“I’d be open to doing all types of songs, [it’s] so hard to just pick one,” he added.

Watch Cee Lo and Gwyneth’s colourful performance at the Grammy’s here:

Gwyneth Paltrow is confirmed to reprise her role as substitute teacher Holly Holiday and while things heat up between her and Mr Schue, the pair cover Prince’s 1986 hit ‘Kiss’ while sharing a smooch.

“She’s become such a good buddy of mine. It’s kind of weird because I’m making out with my buddy,” Morrison says of the kiss. 

The episode is due to air in America on March 8th.

Watch the ‘Glee’ cast, and Gwyneth Paltrow, performing Cee Lo Green’s ‘Forget You’ here:

In addition to the award, the pop legend was treated to a series of tribute performance from artists including cast members of 'Glee'.

Streisand herself is a focus of the popular musical show as Lea Michele's character Rachel Berry is often compared to her - as both Streisand and Berry boast prominent voices and noses.

Along with Michele and 'Glee' costars Darren Criss and Matthew Morrison, other performers at the benefit included Tony Bennett, Seal, Donna Summer, BeBe Winans, Stevie Wonder, Jeff Beck, Herbie Hancock, LeAnn Rimes, Diana Krall, Barry Manilow, Kristin Chenoweth, and Nikki Yanofsky.

Streisand closed the evening with her own performance.

Watch Darren Criss chatting about Barbra and 'Glee' on the red carpet last night below:

Entitled 'Comeback', this episode features a solo performance from the Glee club's newcomer, Sam Evans (played by Chord Overstreet), as he decides to channel his inner Bieber with a rendition of the teen superstar's hit single 'Baby'. 

This will be the first time the show has attempted one of the young singer's tracks after Ryan Murphy recently explained:

"Glee is NOT doing a Justin Bieber tribute episode. We are not doing any more of those this season. Those are reserved for artists with a big catalogue, ala Madonna and Britney, etc."

Watch the teaser clip for the new 'Glee' episode here: