know the names of these soudtracks? youtube link given

hi there

Here's the link - http://www.youtube.com/watch?v=df9sgJk9IHA

Can you identify:
Track 2 - 0:37 (start time in the clip)
Track 4 - 1:39 (start time in the clip)
Track 5 - 2:02 (start time in the clip)


Thanks

2. Alexandra Burke feat. Erick Morillo - Elephant
4. Taio Cruz - Troublemaker

Anyone know the name of Track 5?