These are the songs sorted according to the word you are looking for (spear)

Lisa - My Only Wish Britney Spears Cover

Britney Spears - Toxic

Britney Spears - Circus

Britney Spears - Baby One More Time

William - Scream & Shout Ft Britney Spears

Britney Spears - Criminal

Selena Gomez - Naturally Ft The Scene