. ♪ isn't she lovely >> reporter: janet jackson, mariah carey and alicia keys, and from gospel, bebe winans, who spoke to deborah robertshe honor of saying good-bye to the voice. >> i'm going to try to sing a song. that's what we'll salute. we'll salute nippy. and we believe we'll meet up with nippy again. >> reporter: the service will be streamed live on the internet. security is expected to be heavy with streets cordoned off for six blocks in every direction. conducting the service will be cissy houston's pastor, /* marvin winans said the family wanted a church funeral. not a big public memorial. >> i don't think this was a matter of public or private, as it was, this is my daughter, and we want to do this with dignity. we don't want to have a parade. we loved her when she was nippy in new jersey. >> reporter: despite bad blood between houston's family and her ex-husband, bobby brown, sources tell abc news, he will be there to comfort the couple's daughter, bobbi kristina, who, following her mother's death, collapsed twice and is now said to be doing better. and abc news has been told that bobby brown, who performed t