My goodness, you do know the story well!

Yes, Ursula tricked the prince into proposing to her instead, and Ariel was left in despair.But her fish friends found her, and told her about Ursula's trick, and they helped Ariel stop the wedding. The fish friends shattered the necklace, and Ariel could sing again! The Prince broke out of his spell, and realized Ariel was the mystery singer, and he confessed his love.

They were just about to have true love's kiss... when the sun set!