His single Pagdating ng Panahon became a major hit in 2001 and it enabled his to start a music career.Seguerra won The Singing Bee on July 8, 2008 after Rachel Alejandro gave up his throne as defending champion due to other engagements.Seguerra also performed in Singapore for the Singapore Repertory Theatre presentation of the stage play "Avenue Q." On January 7, 2013, Seguerra entered the Himig Handog P-Pop Love Songs contest as the interpreter for the song entry called "Anong Nangyari Sa Ating Dalawa," written by Jovinor Tan.He performed the song in the grand finals on February 24 at the SM Mall of Asia Arena.The title song, the folkish "Pagdating Ng Panahon," which is a love song, is one of the better Philippine compositions, while another Filipino composition, "I See You Lord," is a pleasant paean to God.Though the album shouldn't rely so much on remakes of foreign hits, Aiza handles all the material with confidence, and her interpretative ability is subtle and charismatic.She may have a future as a singer, however, as she appears confident and poised on this album.In addition, she can actually sing, which is more than can be said for many solo artists in the Philippines.
In 2013, Seguerra, along with other local celebrities, came together to join the PETA campaign 'Free Mali', a campaign aimed to release Mali, an Asian elephant currently living at the Manila Zoo and the only captive elephant in the Philippines, due to the poor facilities and keepers to care for him. Then type your knowledge, add image or You Tube video till "Good-o-meter" shows "Cool" or "Awesome! Don't hesitate to explain what songwriters and singer wanted to say.Seguerra spoke up saying that "Mali has been sentenced to a life of loneliness, misery and neglect.When people all around the world are calling for Mali to be freed, in light of the suffering he has endured at the hands of the Manila Zoo, the proposal to bring in more elephants to the zoo is outrageous.