Thanks, the workflow is: 1. User enters artist name 2. Top tracks of Artist shown as dropdown (Last.FM) 3. User selects track 4. Max 150 Similar tracks fetched

Thanks, the workflow is: 1. User enters artist name 2. Top tracks of Artist shown as dropdown (Last.FM) 3. User selects track 4. Max 150 Similar tracks fetched from Last.fm according to that song 5. Fetch for every track the first hit from youtube (yes, 150 ajax calls) 6. Merge jsons, produce 1 big list 7. Start MTV! Somehow this approach works for 99% of the times.