This is me translating Never going to give you up by Rick Astley into Sindarin.
I just wanna tell you how I'm feeling; Gotta make you understand; Never gonna give you up; Never gonna let you down; Never gonna run around and desert you; Never gonna make you cry; Never gonna say goodbye ; Never gonna tell a lie and hurt you
Aniron ped lyenna tendile nin Tolen cared lyenna henia
Avon algar lyenna
Avon al gellad (or maybe Avon u gellad)
von nausadron a awarthad
Avon carnurd
Avon pedo Boe annin mened
Avon pedgaur a naegrad
I had to use a lot of negatives like "na (to be) u (no/negative) sadron (faithful) to express "run around" but if anyone has a more elegant expression I'm all for it.