Happy Birthday to Aussie singer Delta Goodrem (1984), thong lover Sisqo (1978), 98 Degrees singer and Jessica Simpson's husband Nick Lachey (1973), blues singer Susan Tedeschi (1970), WWE star Chris Jericho (1970), Salt-n-Pepa singer Sandy "Pepa" Denton (1969), the Incredible Hulk's Lou Ferrigno (1951), baseball Hall-of-Famer Bob Gibson (1935), astronomer Carl Sagan (1934; d. 1996), actress Dorothy Dandridge (1923; d. 1965), and Austrian screen siren Hedy Lamarr (1913; d. 2000).