After we told you about a condition called “Blue Dot Fever” that’s  spreading  to music acts and their summer tours — the Pussycat Dolls are the latest group to come down with a bad case. The ‘90s act has pulled the plug on their reunion tour, the same day as our report that  Post Malone, Zayn Malik  and  Meghan Trainor  have either paused or called off their tours altogether. After we told you about a condition called “Blue Dot Fever” that’s spreading to music acts and planned big summer tours — the Pussycat Dolls are the latest group to come down with a bad case. Getty Images On Monday we reported a music insider as saying: “Seems that Post Malone came down with a serious case of Blue Dot Fever,” referring to those blue dots indicating available seats on a Ticketmaster seating chart.…