Britney Spears documentary Framing Britney Spears, which focuses on the sexist treatment of the pop star throughout her career, and of women in the entertainment industry at large.The airing of the film forced Justin Timberlake to issue a lengthy apology regarding his past treatment of both Janet Jackson and his ex-girlfriend Spears, and Letterman is also being criticised for the past interview with Lohan.“Aren’t you supposed to be in rehab?” Letterman asks the Mean Girls star in the clip,