As Miss Universe 2003, Vega traveled extensively working with internationally recognized HIV/AIDS organizations including the Global Health Council, Cable Positive, amfAR, the Elizabeth Glaser Pediatric AIDS Foundation, and God's Love We Deliver. As a celebrity spokesperson, she was responsible for working with the international media to generate a better understanding and acceptance of AIDS and HIV and its prevention while helping to increase awareness, funding and resources for these key organizations.

After moving to an apartment in New York provided by Donald Trump which as part of her overall prize package as the new Miss Universe titleholder , Amelia visited many countries around the world including Indonesia, China, Canada, Thailand, Vietnam, Mexico, and Puerto Rico. Amelia returned to her home country several times, and was awarded an honorary medal in the 2003 Pan American Games, held in Santo Domingo. Later that year, Amelia co-hosted the Festival Presidente de Música Latina, a Latin American music concert lasting three days and held every two years in the Dominican Republic.

As Miss Universe, Vega represented the Miss Universe Organization. Her "sister" 2003 titleholders were Tami Farrell (Miss Teen USA, of Oregon) and Susie Castillo (Miss USA, of Massachusetts).

--Wikipedia