Lenny Kravitz is looking to the past to celebrate the present. The musician commemorated his famous daughter's birthday on Wednesday with a sweet throwback pic.Lenny took to Instagram where he shared an adorable father-daughter photo from a beach outing back when Zoë Kravitz was a little girl.In the photo, a white t-shirt clad Lenny and a toddler-aged Zoë — rocking an adorable American flag bathing suit — are enjoying the sun while building sandcastles on the shore.«Happy Birthday, Zoë.