Lindsay Lohan Coldplay Tix Were A Gift from Lead Singer

8/4/2011 10:55 AM PDT

Lindsay Lohan's Coldplay Tix -- Gift from Lead Singer

Lindsay Lohan
didn't pay a single cent for her kickass seats at the Coldplay concert last night ... TMZ has learned they were given to her by lead singer Chris Martin himself.

Sources close to Lindsay tell us ... the two have been "good friends" for years ... and when LiLo found out about the show, she reached out to Chris in the hopes she could take her younger sister to watch the band play.

We're told Chris was more than happy to oblige -- and the band's manager confirms that Lindsay was hooked up with a couple of seats right near the stage.