It seems she felt playing anything but mellow and/or downbeat songs would be disrespectful to the dead.
And I think that unless it's 9/11 or something like that, this trend needs to stop.
DM had it right: we don't do "death" on 10@10 (although he broke that rule a couple of times, most memorably for Robin Gibb and George Harrison).
It's fine to play a few clips or a song in tribute to the departed, but to give the whole set a maudlin, funereal tone is not good, sez I.