The International Festival comes to Poly/Western this weekend, and it should be great fun. Besides all the traditional arts and crafts, demonstrations, and food, there will also be music from War, Third World, Chopteeth, and others. And it’s free!! Tonight, Grammy-winning trumpeter Brian Lynch plays An die Musik, and tomorrow, the Creative Alliance hosts the Mobtown Ukefest. Sunday, visionary artist Loring Cornish unveils two new mosaic pieces in the 3200 block of Tioga Parkway at 4 pm, Death Cab for Cutie plays Merriweather, and Guster and Jack's Mannequin headline a show (sponsored by Baltimore) at Pier Six.