Nadja Benaissa, one of Germany’s biggest pop stars, has admitted that she had sexual relationships with several men without telling them that she carries HIV virus, according to Daily News.Benaissa of the best-selling girl group No Angels, told a German court on Monday that she knowingly exposed multiple men to the HIV virus without telling them she was a carrier.Benaissa, 28, is on trial this week, accused of "grievous bodily harm and attempted aggravated assult," British newspaper The Guardian