Before Carla Bruni became French First Lady Carla Bruni-Sarkozy, she was a supermodel who dated such veteran rockers as Eric Clapton and Mick Jagger.  But she also had and appetite for a little dark meat as well.  It seems while, in Paris to promote the 20th anniversary of his debut album "Let Love Rule." Kravitz admitted to reporter that he and Bruni-Sarkozy were long-time acquaintances.  But when pressed on how he knew the ex-model and socialite, Kravitz only smiled and repeated:  "I know Carla from back in the day."  The nature of their relationship apparently has no bearing on President Nicolas Sarkozy, who is a fan of Kravitz's and sent him a note that singled out some of his favorite songs for the artist.  "I have a nice letter from your president," Lenny told reporters in a studio on the outskirts of town.  "Wow, I was, like, ‘you listened to the record!'"  Lenny Kravitz kicked off his European tour on April 17 with his first concert in Caen, which is in the north of France.  Lenny Kravitz was a class act, but he knows the truth was Carla was one of his jump-offs back in the day.