Taylor Swift has nine No. 1 singles on Billboard ‘s Hot 100 chart. She is nearing the top of the list of artists with the most No. 1 songs on that particular chart.

United Airlines: United limits underseat luggage to 9 by 10 by 17 inches. Southwest Airlines: Personal items must fit in the 16.25- by 13.5- by 8-inch space underneath the seat in front of you.