Botelho-Hoeg won the chance to perform with the Pops at its Fourth of July concerts on the Boston Esplanade, and to tour with the ensemble to Philadelphia and Washington, D.C.
The competition began in May with two days of open auditions for hundreds of applicants. Judges chose 18 competitors, who faced off in a series of public events ending on June 24. Botelho-Hoeg won with a rendition of "When You're Good to Mama" from the Kander and Ebb musical Chicago.
Botelho-Hoeg also entered the competition last year, but was eliminated in the second round.
The winner of last year's inaugural competition was Tracy Silva of Taunton, Massachusetts, a van driver for special-needs children and a mother of two. Since winning the competition, she has sung the National Anthem at a series of sporting events and appeared in concerts and musicals in Massachusetts.