This should quell those death threats that Kim Kardashian has been receiving from Justin Bieber's rabid tween fan base: She's getting to know someone who's age-appropriate. The only problem is she may now have to worry about rabid football fans. E! News says the callipygian brunette recently traded digits with Dallas Cowboys receiver Miles Austin after meeting through mutual friends, and the two have been chatting regularly on the phone. "Kim's loving the single life," says a snitch, "but she thinks Miles is a good guy." Kardashian, who clearly has something of a weakness for athletes, was briefly linked to overly bronzed soccer star Cristiano Ronaldo following her post-Super Bowl breakup with New Orleans Saints star Reggie Bush. "She's been joking she could bring him good luck like she did with Reggie," adds the spy. But it seems Kim's busy schedule of reality TV and weight-loss product shilling means putting her personal life on hold. "She's filming four days a week for 'Keeping Up with the Kardashians,'" scoffs another insider. "The girl doesn't even have time for a cup of coffee, much less dating!"