Circus (Instrumental Track Without Background Vocal)[Karaoke in the style of Britney Spears] - song and lyrics by Backtrack Professional Karaoke Band | Spotify
Album review: Britney Spears - Circus
Instrumental — Blog — Britney Remixed
Britney Spears – Circus (2009, CD) - Discogs
Britney Spears || Circus: Instrumentals | Ernesth García | Flickr
Britney Spears - Instrumental Discography || Ernesth García - Album Artwork - Spill It Now
Circus: The Rarities [Deluxe Edition] (Full Album) - The Britney Spears Community - BreatheHeavy | Exhale
kayshaˣ on Twitter: "14. “can't say no” (2011) samples the instrumental in britney spears' “blur” (2008) https://t.co/onbx8W5v0v" / Twitter