(TrendHunter.com) Krispy Kreme and TGI Friday's Japan teamed up to create Friday's Signature Doughnut Burger. The collaboration led to an unlikely concoction of sweet and savory items. The two chains got... (TrendHunter.com) Krispy Kreme and TGI Friday's Japan teamed up to create Friday's Signature Doughnut Burger. The collaboration led to an unlikely concoction of sweet and savory items. The two chains got...