Mentirle is a powerful verb that combines mentir (to lie) with le (to him/her/you), meaning "to lie to someone". It's a fantastic example of how Spanish attaches pronouns directly to verbs.
In this passionate salsa track, which is literally titled "A Quién Quiero Mentirle" (Who Do I Want to Lie To?), Marc Anthony uses the word to express his internal conflict. He's trying to fool both himself and his ex that he has moved on, but he can't escape his true feelings. This single word encapsulates the entire story of heartbreak and self-deception.
Have you ever run into an ex and immediately pretended you're doing great? That's exactly where this Marc Anthony classic starts. He sees his old flame, who asks if he's forgotten her. He puts on a brave face, saying, "Yo también he vuelto amar" [I've also fallen in love again]. He even claims he's at peace and that their breakup was for the best. It's all very polite and a little bit fake.
But then the music swells, and he drops the act, at least with himself. The whole song hangs on one desperate question: "¿A quién quiero mentirle?" [Who am I trying to lie to?]. He admits he's just trying to convince himself that she's in the past. The truth comes out in the final lines: "Yo trato de olvidarte... Pero no lo consigo" [I try to forget you... But I can't do it]. He's not over her at all, and he knows it.