you put bratny in the car with james corden, i'm watching that. the internet buzz is rathering its head ♪ ♪ >> critics are pointing out that britney appears to be maybe lip-syncing. >> you can hear her a little bit. >> a little bit. >> i'm still going to watch. i love it. >> can't get into it after some called out britney on cbs this is only a teaser. we're not ruling out spears will sing to "toxic" in addition to her little car dance. we hear tomorrow night's segment was filmed in july, weeks before this post from all 10th. they shot around the cbs studio lot where james tapes his show and when brit was spotted by fans, she waved. >> my dancers came with me. >> did you do "baby one more time"? >> yes, i did. so embarrassed. >> him driving new york city director, no camera people. just them in the car. the conversation unfolds as it does. >> tiny gopro cameras caught each angle. britney was in all black. she was on a break from both her vegas show which returns tonight and her sons. >> have they seen your show, vegas show? >> yes. >> i saw my mom