Billiam said on Tuesday, 03 July 2012:
There is more Ace if Base Don't Turn Around 0:53 for Alejandro

http://www.youtube.com/watch?v=INi7srItF6g

Xanadu said on Tuesday, 17 August 2010:
Oh my... there's more...
http://www.youtube.com/watch?v=euHuQ2AWcts --> Set In Motion [Rock]
http://www.youtube.com/watch?v=tSeuhmaxqHU --> The Suit [Metal]
http://www.youtube.com/watch?v=KJYSy8_9XxA --> Eyes vs the Sky [Metal]
http://www.youtube.com/watch?v=P8JnbN7BMb4 --> Eternal September [Metal]
http://www.youtube.com/watch?v=TiSb9a3-FrI --> The Cover All Stars [Instrumental/House]
http://www.youtube.com/watch?v=AHLBpmlc7zY --> Gary Go feat. Mr. Dialysis [Classical/Piano]

A mix with Kanye West's Love Lockdown and Rihanna's Disturbia by The Mission District
http://www.youtube.com/watch?v=lTCeLQY84IQ

Haven't found a specific one I am looking for yet... it's a dance/house cover with almost computer generated vocals, very staccato. I was used in the promo for the Dutch show So You Think You Can Dance

Xanadu said on Tuesday, 17 August 2010:
Just Dance (semi-)professional unreleased covers:
http://www.youtube.com/watch?v=B2UbjM_e0Eg <-- Disco Curtis [Rock]
http://www.youtube.com/watch?v=b4kyuY_jQRU <-- The Soundtrack [Rock]
http://www.youtube.com/watch?v=77QjbNL84q4 <-- Ink [Rock]
http://www.youtube.com/watch?v=ONwzI5yDo90 <-- Rebecca Shearing [Dance/Electro Pop]
http://www.youtube.com/watch?v=h3zQg2S5Mss <-- Mayday! Cried The Captain [Dance/Electro Pop]

This song is popular to cover, especially as a rock cover...

DJ Anubis said on Sunday, 04 April 2010:
Great live cover of Bad Romance by Lissie: http://www.youtube.com/watch?v=MWe07krS8_E