about who is attending tomorrow's service. kevin costner will speak, aretha franklin and stevie wonder will perform, alicia keys and dionne warwick will be there, as well. >> and you'll be singing at the funeral? how difficult is that going to be for you? >> it's not going to be easy. i can tell you that. it's not going to be easy. but cissy asked me to do and i'm going to try to do my best. >> do you know what you're going to sing? >> not really sure right now. >> houston's ex-husband bobby brown honored her last night at a concert in maryland. thanking her fans for prayers and support. we'll have coverage tomorrow right here on msnbc noon eastern time. here's a look at some other stories people are talking about right now. a workplace argument between an immigration agent and his boss led to a shooting that left one