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Reba McEntire<\/a>\u00a0and her partner, Rex Linn, joked that he wants in on one of the most popular <\/span>Super Bowl prop bets<\/a>\u00a0— guessing the length of the national anthem. And now they know we know.<\/span><\/p>\n The country legend took to Instagram on Saturday and shared video of her and Rex recreating a classic <\/span>Friends<\/em><\/a> scene from season 5, “<\/span>The One Where Everybody Finds Out<\/a>,” or as most amigos remember it — the one where “they don’t know we know they know we know.”<\/span><\/p>\n In the video, Reba and Rex can be seen mouthing the famous lines, inferring they may know how long she’ll take to belt out her soul-stirring rendition of the national anthem. There are dozens, if not hundreds, of prop bets, but the length of the national anthem is a classic Super Bowl prop bet and arguably one of the most popular ones.<\/span><\/p>\n Reba poked fun that Rex wants to take part in the bet. She captioned the post, “When Rex wants to bet on the National Anthem length…”<\/span><\/p>\n For the record, the updated <\/span>over\/under<\/a>\u00a0for the length of the national anthem is currently at 90.5 seconds. For what it’s worth,\u00a0<\/span>CBS Sports<\/em><\/a>\u00a0noted that Reba has never approached 90 seconds in any of her past public performances of the national anthem.<\/span><\/p>\n Following Reba’s national anthem performance, the stage will be graced by none other than\u00a0<\/span>Post Malone<\/a>, who will take on the patriotic duty of singing “America the Beautiful.”\u00a0Adding another layer of musical brilliance, singer and actress\u00a0<\/span>Andra Day<\/a>\u00a0will take center stage and sing “Lift Every Voice and Sing.\u201d<\/span><\/p>\n Super Bowl LVIII<\/i><\/a>\u00a0\u2013 which is airing on CBS and streaming live on\u00a0<\/span><\/i>Paramount+<\/i><\/a>\u00a0\u2013 is at<\/span><\/i>\u00a0Allegiant Stadium in Las Vegas, Nevada<\/i><\/a>, and has the Kansas City Chiefs facing off against the San Francisco 49ers. Keep checking\u00a0<\/span><\/i>ETonline<\/i><\/a>\u00a0for more from the big game, including photos, exclusive interviews and more.<\/span><\/i><\/p>\n