The 41-year-old actor will be joining wife Carmina Villaroel, Janice de Belen and Ogie Diaz as a co-host of "Showbiz Inside Report" during its first anniversary episode on Saturday.
Legaspi will sit in for comedian-host Joey Marquez, who has temporarily left the entertainment talk show as he pursues a congressional seat representing the second district of Parañaque in the May 13 polls.
Shortly after his sit-down interview with Salvador and her mother Thelma Andres -- his first as a co-host of "SIR" -- Legaspi said he is grateful that the actress opened up about her personal life to him as an interviewer.
"Mararamdaman natin naman pag 'yung intreviewee binubukas niya 'yung pinto, kasi may mge celebrities na hirap magbukas ng kanilang saloobin," he said.
"Minsan maganda rin na sinasagot [ang mga espekulasyon] para magkaroon ng sagot doon sa mga malalalim na tanong... Iyon naman ang nagawa ni Maja," Legaspi said.
Legaspi, who was previously a co-host of another showbiz-oriented talk show on TV5 until 2012, said his interview with Salvador is one of the most "honest" he has had.
"First time nila (Salvador, mother) na ma-sit together kaya very comfortable sila, atsaka 'yung mga tanong naman are very light hanggang sa nagiging heavy siya," the actor-host said.
"So dito, malalaman nila 'yung mga nasa puso ng nanay ni Maja, at ano talaga ang mga saloobin ni Maja sa kanyang mga pinagdadaanan na mga intriga ngayon," he added.
Salvador is rumored to be in a relationship with actor Gerald Anderson, the former boyfriend of her "Ina, Kapatid, Anak" co-star and best friend, Kim Chiu.
Chiu earlier expressed regret over her "wasted" friendship with Salvador, who has recently become more open of her blooming romance with Anderson.
"Dito malalaman natin kung gaano kabigat," Legaspi said of his interview with Salvador. "Hindi siya masyado nagsalita, pero sa luha niya, malalaman na natin ang mga sagot."
He added: "Mahirap kunan ng sagot si Maja tungkol sa lovelife niya kasi very intriguing siya, pero dito binuksan niya ang pinto."
"Showbiz Inside Report" airs Saturdays on ABS-CBN after the noontime variety program "It's Showtime."
