Taking this Show on the Road

In order to get a specific buff, you need to meet the following conditions:

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• [spell=246585] - Avoid getting hit by any banshee waves, and catch every bolt of light.
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• [spell=246584] - Avoid getting hit by any banshee waves, and miss only 1 bolt of light.
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• [spell=246586] - Get hit by only 1 banshee wave, and catch every bolt of light.
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• [spell=246583] - Get hit by only 1 banshee wave, and miss 1 bolt of light.
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Hey all, sharing what's know of this achievement so far.

During the Blight Boar concert you will obtain a score. If you obtain the highest score of those participating in the event you will receive a 24 hour debuff called [spell=245102]. This debuff is not refreshed on consecutive wins, but you can still win again, even if you already have the debuff.

As well as obtaining this debuff on winning, you will also receive one of four 24 hour buffs, which are the criteria for the achievement. They are [spell=246583], [spell=246584], [spell=246585], [spell=246586]. These buffs simply transform you into the band member of that type and you must have been given each of these buffs at least once to get the achievement.

Whichever of the four buffs you obtain after winning the high score seems to be related to how you perform with the Banshee Walls and Power Chords as described by the buff's tooltips when you mouseover them - 'rhythm' referring to dodging the Banshee Walls and 'notes' referring to soaking the Power Chords (see Addy's comment above).

The buff will disappear on death or if right-clicked, however since you only need to get each buff once to meet the criteria of this achievement, losing it isn't an issue. I actually cancel my previous buff before each concert so I can see for definite which buff I got if I was the Number One Fan. If you do not cancel the buff it's a little tricky to see if you won as the debuff does not refresh and you can potentially get the same buff twice in a row.

As for earning score this is what I've come to believe:
- Defeating the [npc=122899] gives score
- Getting hit by a Banshee Wall reduces score
- Standing in the Power Chords (light things falling from the sky) gives score
- Dealing damage to the Ghouls gives score

I'm unsure how exactly score is awarded when it comes to the ghouls - whether it's the knockback that gives score or just dealing constant damage. As an affliction lock I'm able to simply dot them up and that seems to grant me the most score, however I understand that other classes may not be able to do this, so it may be worth just running around and attacking them all. Just to note though, there seems to be severe line-of-sight issues with the ghouls at the moment, as the knockbacks can push them through the walls or behind the stage making you unable to attack them except for sweeping/banket AoE. I don't really think there's much you can do about this until Blizzard fixes the issues, so just do what you can whilst the ghouls are in range.

Hope this helps.

(Edited for clarity)

To get a specific buff you need to have top score among other players, who also aiming for same buff and do following:

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• [spell=246585] - Don't get hit by banshee waves, catch every bolt of light.
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• [spell=246584] - Don't get hit by banshee waves, miss only 1 bolt of light.
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• [spell=246586] - Get hit only by 1 banshee wave, catch every bolt of light.
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• [spell=246583] - Get hit only by 1 banshee wave, miss only 1 bolt of light.
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Note:
1. Few peoples can have top score in specific buff group and all will get credit.
2. To get max score:

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• kill Death Metal Knight
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• hit and kill all ghouls
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• complete buff criteria
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3. Previous buffs does not effect performance.
4. Death resets counters but also resets your score (If there just few doing it - it may help at fails).

Did myself this way and got achievement.