This is a hard one to figure out

Mine are:

01. The Great Pretender - Freddie Mercury (Original The Platters)
02. Unchained Melody - Rightous Brothers (Original Todd Duncan)
03. Red Red Wine - UB40 (Original Neil Diamond)
04. Hound Dog - Elvis Presley (Original Big Mama Thornton
05. Hallelujah - Jeff Buckley (Original Leonard Cohen)
06. Mr Tambourine Man The Byrds (Original Bob Dylan)
07. Comfortably Numb - Scissor Sisters (Original Pink Floyd)
08. I Will Always Love You - Whitney Houston (Original Dolly Parton)
09. Step On - Happy Mondays (Original John Kongos)
10. All Along the Watchtower - Jimi Hendrix Experiance (Original Bob Dylan)

The worst have mostly been recorded from simon cowells artists from his talent shows