Singer Britney Spears and husband Sam Asghari signed a prenuptial agreement "in her favour" ensuring the money she made before their wedding is protected, reported Page Six. The 40-year-old singer got engaged to the 28-year-old personal trainer-turned-actor in September. Sam had earlier joked, "We're getting iron-clad prenup to protect my jeep and shoe collection incase she dumps me one day."