fawn (all) over (one)
To flatter and fuss over one. Any time that famous singer comes here, people can't help themselves— they just start fawning all over her.
fawn (all) over someone
Fig. to flatter someone or attend to someone excessively; to curry favor with someone. Please stop fawning all over the guests. You are embarrassing me. She always fawns over us when we visit.