#TBT: The 17 Best Pop Star Guest Appearances on TV

We’re getting super nostalgic right now.

Brit on TV!
Britney Spears will guest star on 'Jane the Virgin.'

With news that Britney Spears will be guest starring on Jane the Virgin, Lady Gaga coming to American Horror Story and Mariah Carey (and, like, a million other people) appearing on Empire, we couldn’t help but get to thinking of all the other pop stars who have made appearances on television in years past.

Thus, in celebration of #TBT, we’re taking you down memory lane and checking out our 17 favorite pop star cameos on TV:

1. Destiny’s Child on Smart Guy in 1998.

2. The Backstreet Boys on Sabrina the Teenage Witch in 1998.

3. Aaron Carter on Lizzie McGuire in 2001.

4.  Madonna on Will & Grace in 2003.

5. Jennifer Lopez on Will & Grace in 2004.

6. Britney Spears on Will & Grace in 2006.

7. Chris Brown on The O.C. in 2007.

8. Britney Spears on How I Met Your Mother in 2008.

9. Taylor Swift on CSI in 2009.

10.  Justin Bieber on CSI in 2010.

11. Demi Lovato on Grey’s Anatomy in 2010.

12. Katy Perry on How I Met Your Mother in 2011.

13. Adam Labert on Pretty Little Liars in 2012.

14.  One Direction on iCarly in 2012.

15.  Demi Lovato on Glee in 2013.

16. Prince on New Girl in 2014.

17. Kelly Clarkson on Nashville in 2014.