I counterpick with http://i1.kym-cdn.com/photos/images/original/000/877/200/b90.jpg
I did Lux one for all... told everyone to laugh in Champ Select ... got paired against Lux needless to say we all threatened to laugh if we didn't stop laughing
Nunubot squad is a hard counter to Lux spam.
While funny (and fairly effective at POing the enemy) a true overpowered strat is against an AP focused team, who all built AP, is to just stack 5 banner of Commands. Promote every minion in the wave that you can, and just roll with the now immune to magic damage minion wave ya got, while you all got roughly 60 MR (40 from self banner, 20 from one instance of an allied banner being applied).
5
spamming laugh.
...Wait.
Counterpicked with 5
bot
Looks like it worked:
5
' s spamming their jokes.
Gems for days.
They will win just by being truly truly outrageous.
picks nunubot come at me
Gragas counters lux, I'm not even kidding.
Who needs a map?
If I were
I would just incinerate them.
I mean, come on. you're made of fire.
"DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DON-DONT WORRY"
"DONT WORRY YOU CAN LEARN SO MUCH FROM FAILURE"
i think i would begin to slit my wrists
you belong in a museum
Poor Lux

Or simply just go Zac and leave the ultimates for impending team fights. http://i.imgur.com/jY6XYl1.png GG
lolol :D
ITS FUNNY BECAUSE ITS TRUE
mute sound. is k.
Countered by definitely not 5 
Get a yasuo 
hits mute button
WHY DO I STILL HEAR IT?!
Whenever there's a Lux on the enemy team, I turn my voice volume all the way down immediately. End the suffering before it begins!