The Chancellor has warned that an independent Scotland would risk losing the pound.
Speaking in Glasgow George Osborne cast doubt on a euro-style currency zone, but the Scottish government disagree and has accused the Chancellor of scaremongering.
ITV News Political Correspondent Libby Wiener reports:
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The singer ended speculation over who would perform by saying "the rumors are true" to her 63 million Twitter followers on Friday morning.
There will be lighter winds for all of us than yesterday, although it will still feel cool.
Senior fashion analyst at Mintel Tamara Sender said: "For the first time ever sales of trainers have overtaken high heels."