Lady Gaga has opened up about how much she cherishes her friendship with Ariana Grande, admitting it’s so hard to make good female friends in the music business.The 34-year-old singer is good pals with Ariana, and the pair recently collaborated on the chart-topping tune Rain on Me. Gaga spoke about the friendship during an interview on CBS Sunday Morning, and smiled: “I love that girl.”“You know how hard it is to make a female friend in this business?” she continued.