The Backstreet Boys have officially partnered with Tencent-owned social media app WeChat “to give fans in China the performance of a lifetime.” The Backstreet Boys, who hit the road as part of their DNA World Tour about three weeks ago, just recently unveiled the WeChat partnership. Sponsored by Lincoln – the specifics of this sponsorship haven’t been publicly disclosed – the “free” virtual concert at the center of the deal “is expected to draw an astounding 40 million viewers,” according the formal announcement message from the happening’s organizers. This figure reflects an improvement of about 13 million watchers from the…