[dime]

I would highly suggest you get a license to feature the lyrics on your site if you intend on going mainstream. Aside from legal troubles you could face, I think intellectual property should be respected. Using someone's copyrighted material without their consent is never ok.

[anewaccountname]

>Using someone's copyrighted material without their consent is never ok.

Sometimes it is fine.

[rms]

It is almost definitely fine if you live outside of the USA.

[agentbleu]

It seems the norm in this sector is to be open about this data (lyrics), all of the main sites have same and none are in license agreements. Plus others are opening shop with APIs for access.