Happy Birthday to Sugababes singer Keisha Buchanan (1984), actor Kieran Culkin (1982), "Party of Five" actress Lacey Chabert (1982), Swiss tennis star Martina Hingis (1980), WWE Diva Candice Michelle (1978),

Tennis ace Martina Hingis is under investigation after testing positive for cocaine. The 27-year-old Swiss player announced her retirement from the sport on Thursday after admitting she failed a drug test at the Wimbledon tennis championships in England earlier this year.

Happy Birthday to Sugababes singer Keisha Buchanan (1984), actor Kieran Culkin (1982), "Party of Five" actress Lacey Chabert (1982), Swiss tennis star Martina Hingis (1980), WWE Diva Candice Michelle (1978), "Krippendorf's Tribe" actress Jenna Elfman (1971),