Brazilian indie-pop rockers CSS [ tickets ] will hook up with Omaha-based indie-pop outfit Tilly and the Wall [ tickets ] this month for a short run of North American dates that will be documented for a film.

The bands will warm up with mid-September shows in the Denver area, Salt Lake City and Vancouver before firing up the cameras for dates in Seattle; San Francisco; Los Angeles; Portland, OR; and Pomona, CA. The schedule is listed below.

Though they'll have their own film crew, the two groups are also inviting fans to document concerts with video cameras and send in their own personal footage.

"Start your tape rolling and show us what this music means to you and your lives," the bands said in a press release. "We want you to document your lives, your bands, the places you hang out. Show us how CSS and Tilly and the Wall have influenced your life."

Submissions, due Oct. 15, will be viewed and considered for the final film. It should be noted that cameras will not be allowed at the Los Angeles performances. Guidelines and further information can be found at White Light Media's website.

CSS is currently in Europe and will visit Mexico before the US jaunt, which will be followed by the band's first major UK tour. CSS's full itinerary can be found at its website.

The Sao Paulo-based group--described as equal parts dance party, urban circus and out-and-out chaos--is supporting its sophomore set, "Donkey," which surfaced in July and broke into The Billboard 200. The video for the lead single, "Left Behind," is streaming at CSS's MySpace page, along with a few other tracks from the set.

Tilly and the Wall will also keep going after the joint tour, playing a few more West Coast dates and then heading across the Pond in October. Details can be found at the band's website.

The Omaha quintet is backing its third album, "O," which popped into the Top 20 on Billboard's Top Heatseekers chart following its June release. The record is said to redefine the band's sound with bolder steps toward experimentation. A couple songs from "O" can be heard at Tilly and the Wall's MySpace page.

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