Here's an introduction to the acts appearing Tuesday, June 29 at Top of the Park — the Ann Arbor Summer Festival's free, outdoor component, held outside the Rackham Building, on East Washington Street at Ingalls Mall. And don't forget the Top of the Park Photo Contest, presented by AnnArbor.com for the festival.

The KidZone Tent is open from 6:30-8 p.m., and during those same hours the festival will hold one of its global parties, a Mahrajan Middle Eastern Celebration.

The evening's headline attractions:

Bassam Saleh Rackham Stage, 6:30 p.m.

Get on your feet as vocalist Bassam Saleh and his high-energy band bring back centuries-old traditions of Arabian night’s full of music, song and dance. This band promises to rock the mall with the hottest dabke in town.

More info: Website

Listen to Bassam Saleh "Cocktail" (MP3).

Bassam Saleh performing live in Detroit last year:

Drivin' Sideways Rackham Stage, 8 p.m.

Drivin' Sideways is “real country music” and plays a mixture of classic country, blues, rock covers and original material.

Performing since: 1986 Home base: Ann Arbor Style of music: Classic country, rockabilly, rock Members: Pete Ferguson, George Bedard, Jim King, Mark Newbound, and Chris Goerke, Jimmy Grant. Pre-show ritual: Moving heavy musical equipment. Favorite road food: Waffle House Desert island disc: Any George Jones, Johnny Paycheck and Buck Owens Best thing about Ann Arbor: Summer. More info: Website

Movie: "Avatar" (2009, PG-13, 162 minutes) Ingalls Mall, 10 p.m.

Director James Cameron created what is, by some measures, the most commercially successful movie of all time — a futuristic tale of a paraplegic marine dispatched to the moon Pandora at the last moment after his brother is unable to complete the mission. Fulfilling orders to gain the trust of Pandora’s native inhabitants, the marine finds himself torn between following his orders and protecting the world he feels is now his home.

Watch the "Avatar" trailer: