With Eiffel Tower serenade, Celine Dion makes a musical comeback at Paris Olympics.

Friday's spectacular comeback by Celine Dion included a highly publicised performance:

Friday's spectacular comeback by Celine Dion included a highly publicised performance:

Watch the Paris Olympic opening ceremony from the Eiffel Tower.

With a stirring performance, Gaga helped formally start the Olympics, and Dion ended the event when the cauldron was ablaze.