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System Of A Down doesn't usually make music for people to fall asleep to, but the folks at "Twinkle Twinkle Little Rock Star" have changed that with their latest collection of lullabies.  They've transformed System of a Down hits like "Chop Suey!" into songs that are perfectly suitable for tired children. 

The Twinkle Twinkle Little Rock Star team admits these versions are soft and cute, but they also insist they're serious recordings. 

They add that the fidelity of the music is "at the top of the priority list."  System of a Down is the latest act to get the lullaby treatment, but Twinkle Twinkle Little Star also has albums filled with classics from Slayer, Metallica, the Red Hot Chili Peppers, and many more.  The full collection is available at