ATB, Markus Schulz — songs

• 03:15
  Heartbeat
• 04:57
  Heartbeat (Festival Mix)
• 04:52
  Heartbeat (Festival Mix) [RUHRTONE RECORDS]
• 06:37
  Heartbeat (Festival Mix) [Kontor]
• 05:08
  Heartbeat (Intro Festival Mix) [radiorip]

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