Should I take my 9-year-old sister to a Bruno Mars concert?

My very wealthy uncle is taking my two sisters and I to a Bruno Mars concert in May. Now, being one of Bruno's long time fans, I have all of his albums, and know that he is a druggie and cusses occasionally in his songs. My parents and I are just wondering if allowing my 9-year-old sister to go to his concert is a good idea. Has anyone been to one of his concerts and knows what they're like? (i.e. Does he throw out cuss words like every day words, etc.) Thanks in advance.