>>> sarah ferguson's open letter taking aim at social media calling it a sewer as the palace battlesnding the duchess this morning. ♪ >>> isn't this romantic? miley cyrus steps in for sick husband liam hemsworth after he was stuck in the hospital. what she's revealing now about his condition. ♪ hit you with that ddu-du ddu-du ddu-du♪ >> and are you ready for k-pop supergroup blackpink? they're turning up times square in their american morning tv debut live. are you ready? and they're here to say -- >> all: good morning, america. >>> and good morning, america. thanks for being with us this tuesday morning. you just saw that jumbotron up there in times square. when blackpink came on, they went nuts.alor this moment to see those ladies live and we've got them taking selfies with some very excited fans. >> i cannot wait for that. >>> but first, we do have a lot of headlines to get to this morning. but we're going to start with two winter storms moving across the country, more than 110 million people are on alert. ginger is back with the latest. good morning again, ginger. >> we have to s

. >> now, the duchess of york, sarah ferguson is weighing in. shef. >> reporter: sarah opening up in a candid letter in "hello" magazine, taking aim at what she calls a sewer of social media. in what many royal watchers see as a not so veiled reference to a divide between duchess meghan and duchess kate. fergie writing, women in particular are constantly pitted against and compared with each other in a way that reminds me of how people tried to portray diana and me, all the time, as rivals, which is something neither of us ever felt. >> she absolutely is referring to the treatment of meghan and kate. certainly there are parallels between the relationship that kate and meghan have and diana and fergie had. >> reporter: the pointed essay, by the duchess of york, an endorsement to hello to kindness campaign, something fergie says can take a lasting toll. this isn't about freedom of speech. the truth is it's not acceptable to post abuse or threats on social media or news cites, she writes, adding it's not acceptable to troll other people viciously on