Where do people "learn" that an apostrophe is ever used for a plural? It makes no sense. An apostrophe is only used when indicating possession--always has and always will.
Mistakes like this just make people, and broadcasters in this case, look stupid.
And why do people leave the last "s" off sometimes:
New Hampshire's Best Rock
Massachusetts' Best Rock
The word Massachusetts when above should be spelled "Massachusetts's". Unless the word is already plural, you should always add a "'s" at the end. Just because the word happens to end with an "s" does not eliminate the need for the "s" after the apostrophe.
I see this mistake almost everywhere, including newspapers, so maybe it's becoming accepted.
Cheer's to you all,
Paul