Wrong: Écouter à la radio

Right: Écouter la radio

Explanation: The French verb écouter means "to listen to" - the idea of the preposition "to" is included in the verb itself. But beginners often mistakenly add à to it, in effect saying "to listen to to something," which is obviously incorrect.

J'écoute la radio - I'm listening to the radio

Il aime écouter les discours - He likes listening to speeches

Écouter is one of several French verbs that are not followed by a preposition whereas their English equivalents are.