In large mixing bowl , beat cream cheese until fluffy. If your cream cheese isn't soft enough you will get lumps. Gradually beat in sweetened condensed milk until smooth. Mix in lemon juice and vanilla until WELL combined. This is important so that it is combined enough and will firm up.
Pour into graham cracker crust and chill at least 3 hours. Pour on cherries (you might not need all of them) and chill before serving.
Source: my mom Jeanine Larson