The avoidance game that’s all the rage apparently is not hurting the popularity of “Last Christmas,” released by Wham! 39 years ago. For the first time, the song is top of the Christmas chart in the UK, the BBC reports. Andrew Ridgeley said the other half of Wham! always wanted a Christmas No. 1. George Michael “felt any great songwriter should be able to write a Christmas hit to order,” Ridgeley said, adding, “he’d be absolutely over the moon.” In its first holiday season, the song was shut out of the top spot by Band Aid’s “Do They Know It’s Christmas?” Michael and Ridgely considered that a …