NEW YORK Johnny Depp caused quite a stir when he showed up for an appearance on the Late Show With David Letterman. The A-lister had no problems spending time with fans and posing for the paparazzi. Johnny was there to plug his movie “Transcendence”. He also confirmed that the bling he’s been sporting lately on his finger is in fact a woman’s engagement ring. One that didn’t fit fiancé Amber Heard, so he decided to wear it himself. And David Letterman made some big headlines of his own. The 66-year- old late night host announced he’s retiring in 2015. Janelle Monae and M.I.A. teamed up with Audi for a high tech duet that took place at two separate venues, on two opposite coasts - thanks to the use of holograms. M.I.A. performed in New York while Janelle took to the stage in Los Angeles.