Sony Legacy Records unexpectedly released "The Essential *NSYNC," a double album featuring the boyband's hits, on Tuesday, July 29.

The former members Justin Timberlake, Lance Bass, J.C. Chasez, Joey Fatone and Chris Kirkpatrick apparently had no idea about their latest album release. Bass posted the record's cover art on Instagram. "I love when the record label doesn't even tell you they are releasing a new 'NSYNC album tomorrow!" he captioned the image. "Sounds like they don't want anyone to know about it. Weird."

In addition to commenting on the lack of promotion, Lance Bass talked about 'N Sync's new legacy album during his radio show "Dirty Pop" on SiriusXM. "There's a lot of these songs I don't think I've ever heard," he said. "I remember recording them but I've never heard them before, so I'm interested in just hearing it."

Some of the unfamiliar tracks include "Believe in Yourself," which the group performed on "Sesame Street" back in 2000, as well as a cover of "The Lion Sleeps Tonight," among others.

"The Essential *NSYNC," which is sold for $13.88, is already out of stock on Amazon and currently one of the most downloaded albums on iTunes. Check out the full tracklist below:

Disc 1

1. "Here We Go" [Radio Cut]

2. "I Want You Back" [Radio Edit]

3. "Tearin' Up My Heart" [Original Radio Edit]

4. "God Must Have Spent a Little More Time on You" [Remix]

5. "Thinking of You (I Drive Myself Crazy)"

6. "For the Girl Who Has Everything" [Radio Mix]

7. "Are You Gonna Be There"

8. "Music of My Heart"

9. "Bye Bye Bye"

10. "It's Gonna Be Me"

11. "This I Promise You" [Radio Edit]

12. "I Thought She Knew"

13. "I Believe in You"

14. "If I'm Not the One"

15. "Pop" [Radio Version]

16. "Girlfriend" [The Neptunes Remix]

17. "Gone" [Album Version]

Disc 2

1. "More Than a Feeling"

2. "Best of My Life"

3. "The Lion Sleeps Tonight"

4. "Sailing"

5. "Everything I Own"

6. "God Must Have Spent a Little More Time on You"

7. "Somewhere, Someday"

8. "Trashin' the Camp"

9. "If Only in Heaven's Eyes"

10. "You Don't Have to Be Alone"

11. "On the Line"

12. "That Girl (Will Never Be Mine)"

13. "Falling"

14. "Feel the Love"

15. "Selfish"

16. "See Right Through You"

17. "Believe in Yourself" [TV Version - SESAME STREET]