Here is a video of Selena in a Disney World Parade. The video description says: "Part 2: The Jonas Brothers, Demi Lovato, Cheetah Girls, and Selena Gomez appeared in a special parade for Disney Channel Games in Orlando's Disney Hollywood Studios. BOPtv caught all the action on video!"

Note: Selena comes in near the end...she is on the last car.

And In this video you can hear Selena being announced: