A Polar Palooza, Chicago Book Expo, and Caroling at Cloud Gate; Chicago Tonight knows what’s going on this weekend.

Christkindlmarket, the Magnificent Mile Lights Festival, and the Chicago Toy & Game Fair; Chicago Tonight knows what’s going on this weekend.

The Sun King, Chillfest Chicago, and the Lively Water Whiskey Festival; Chicago Tonight knows what’s going on this weekend.

A Red Bull art show, Eric Schlosser, and Macy's Great Tree Lighting; Chicago Tonight knows what’s going on this weekend.

A film festival, a ball, and Halloween festivities; Chicago Tonight knows what’s going on this weekend.

A Spooky Zoo Spectacular, Navy Pier costume contest, and The Rocky Horror Picture Show; Chicago Tonight knows what’s going on this weekend.

A spooky pet parade, an apple pie contest, and a skelebration; Chicago Tonight knows what’s going on this weekend.

The Chicago Marathon, Beer Hoptacular, and Music Box of Horrors; Chicago Tonight knows what’s going on this weekend.

A mac and cheese fest, the West Town Art Walk, a Chicago Gangster Convention; Chicago Tonight knows what’s going on this weekend.

Hyde Park Jazz Festival, Oktoberfest Chicago, and Randolph Street Market Festival; Chicago Tonight knows what’s going on this weekend.

The Les Turner ALS Walk for Life, Lakeview Taco Fest, and a Concert for Peace; Chicago Tonight knows what’s going on this weekend.

An Ethiopian festival, Chicago Women's Expo, and the AIDS Run and Walk; Chicago Tonight knows what’s going on this weekend.

Broadway-themed boats, the German Day parade, and "Romeo and Juliet" in the park; Chicago Tonight knows what’s going on this weekend.

A jazz festival, the North Coast Music Festival, and a fair for all things reused and recycled; Chicago Tonight knows what’s going on this weekend.

A fashion fest, dancing in Millennium Park, and a 5K obstacle course to raise money for MS; Chicago Tonight knows what’s going on this weekend.

The annual Air and Water show, an international neighborhood festival, and an interactive arts festival; Chicago Tonight knows what’s going on this weekend.