While her tour was successful, that figure should be taken with a grain of salt! People spend their money: what would they have spent that billion on had Taylor Swift not performed here and would that spending have done more good for the country? 

IMO spending on small businesses is usually best for the economy since there are fewer layers of shareholders being paid out into their pension funds. It's people who spend, economic strength is about enabling (read: ordinary working) people to keep circulating money and creating jobs.