GLEE Update: 'Endless Love,' 'I'll Stand By You,' 'Crush' & More Now Available on iTunes

Columbia Records and Twentieth Century Fox Television today released select songs on iTunes featured in this week's episode of GLEE, including cast versions of Diana Ross and Lionel Richie's "Endless Love," The Pretenders' "I'll Stand By You," Jennifer Paige's "Crush," Paul Anka's "(You're) Having My Baby" and Bill Withers' "Lean On Me," as well as a cast mash-up of The Police's "Don't Stand So Close To Me" with Gary Puckett and the Union Gap's "Young Girl."

In this week's all-new episode, airing tomorrow, Wednesday, November 18 (9:00-10:00 PM ET/PT) on FOX, WILL (Matthew Morrison) splits the Glee Club into pairs to sing their favorite ballad, but when one kid gets sick, he's forced to step in and winds up in a sticky situation. Meanwhile, FINN (Cory Monteith) and QUINN (Dianna Agron) have to face the music when dinner with her parents (guest stars Gregg Henry and Charlotte Ross) goes awry.

In addition to these new songs, cast versions of Ike & Tina Turner's "Proud Mary," "Defying Gravity" from Broadway's "Wicked," Billy Idol's "Dancing With Myself," Young MC's "Bust A Move," Neil Diamond's "Sweet Caroline," Sisqo's "Thong Song," Jill Scott's "Hate On Me," The Supremes' "You Keep Me Hangin' On," Jordin Sparks and Chris Brown's "No Air," Avril Lavigne's "Keep Holding On," Queen's "Somebody To Love," Heart's "Alone," Journey's "Don't Stop Believin'," "Maybe This Time" from "Cabaret," Cline Dion's "Taking Chances," Rihanna's "Take A Bow," Carrie Underwood's "Last Name," Jazmine Sullivan's "Bust Your Windows," Kanye West's "Gold Digger," REO Speedwagon's "Can't Fight This Feeling," Salt-N-Pepa's "Push It" and Duffy's "Mercy," as well as mash-ups of Bon Jovi's "It's My Life" with Usher's "Confessions Part II" and Beyonc's "Halo" with Katrina and the Waves' "Walking on Sunshine," are also available for purchase via all digital service providers.

"Glee: The Music, Volume 1," which features music heard in the first season of the series, is currently available for purchase. Released on November 3, the album sold in excess of 113,000 units in its first week alone and garnered an astounding No. 4 spot on the Billboard Top 200 Album Chart. And for fans who just can't get enough of GLEE's high-spirited music, "Glee: The Music, Volume 2" hits stores on Tuesday, Dececember 8.

GLEE, the genre-defying new musical comedy series, follows an optimistic teacher who against all odds and a malicious cheerleading coach attempts to save McKinley High's Glee Club from obscurity while helping a group of aspiring underdogs realize their true star potential. Starring Dianna Agron, Chris Colfer, Jessalyn Gilsig, Jane Lynch, Jayma Mays, Kevin McHale, Lea Michele, Cory Monteith, Matthew Morrison, Amber Riley, Mark Salling and Jenna Ushkowitz, GLEE is produced by Ryan Murphy Television in association with 20th Century Fox Television. Ryan Murphy, Brad Falchuk and Ian Brennan are co-creators of the series. Murphy, Falchuk and Dante Di Loreto serve as executive producers, while Ian Brennan serves as co-executive producer.