He ordered the $84 "clam bake for two" - two whole Atlantic cold-water lobsters, snow crab legs, shrimp, clams, mussels, potatoes and corn on the cob.
Timberlake is in Baltimore for Thursday night's Legends of the Summer concert at M&T Bank Stadium, where he is the co-headliner with Jay-Z.
According to a spokeswoman for Phillips Seafood, Timberlake dined with four others in the Phillips’ private dining room, where he was waited on by Masha Keith.
We could not confirm who was dining with Timberlake, but the bill came to $300.
Timberlake, for the record, left a $100 tip.
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