UPDATEDx2: Lady Gaga’s little monsters camp out for the best spot in Tuesday’s pit

A little food and a pillow are all these devoted fans need for a two-day camping trip in Victory Park.

A group of 20 Lady Gaga fans have set up camp on the corner of North Houston and Olive Street in advance of her sold-out Tuesday night show at American Airlines Center in Dallas. They started congregating early Sunday morning with plans to snag the coveted front row of the pit for Tuesday's concert.

Michael Ainsworth

Lady Gaga fans (and their posters) line up outside American Airlines Center on Jan. 28, 2013.

[UPDATE: By 3 p.m. Monday, 56 people were in line. They moved to the sidewalk on Valor Place, a street that runs along the west side of the AAC, where AAC officials thought would be safer if crowds swell.]

[UPDATE x2: By 7 a.m. Tuesday, the crowd had swelled to about 350 people, by our estimates.]

Lady Gaga’s “little monsters” in many cities are known for their die-hard fandom, with many wearing over-the-top outfits to shows and showing up by the mob.

Dusty Harp, 15, says he and his mother were the first ones there on Sunday. This is his second time seeing Lady Gaga. He’s missing at least one day of school to get a front row spot.

The group is not allowed to camp out on AAC property, but will be allowed on-site at 8 a.m. Tuesday, when "Monster Pit" wristbands will be handed out to general admission floor ticketholders who "arrived first, waited the longest, and came dressed to 'Ball,'" according to the AAC's website. Once campers receive a wristband, they will be able to leave without losing their position in line, said Jenny Walker, AAC marketing and public relations manager. The final entry line before show time will begin at 4 p.m.

Michael Ainsworth

Lady Gaga fans, including Monty Harp, left, of Denton, and her son, Dusty Harp, line up outside American Airlines Center on Jan. 28, 2013.

You won't see any tents on the corner – the "little monsters" have opted for blankets, pillows, and folding chairs to get them through two nights.

Another passionate fan, Brandan Gonzales, 19, set up shop at 2 p.m. with his concert outfit in tow. Inside his bag were 3” heels -- shoes he says he wears whenever he wants (but especially at Lady Gaga and Madonna concerts).

“I don't believe in gender-specific clothes; I like to express myself differently,” said Gonzales.

Harp says most of the fans didn’t know each other before they arrived but have become friends since. The mood was lighthearted and carefree out there late Sunday night; nothing could seemingly diminish the fact that these people will be enjoying a front row spot at Tuesday’s Lady Gaga show. They say as many as 400 people can fit in the Monster Pit, but Walker said the tour cannot confirm the exact number.