If you want the distilled sound of global hypercapitalism, David Guetta is your man. A genial, workaholic Frenchman, he has created the sound of superclubs from Miami to Dubai to Kuala Lumpur – the sort of clubs where the VIP section is bigger than the main dance floor, with Guetta's own “F*ck Me I'm Famous” parties in Ibiza as the ideal model – and, thanks to the trickle-down effect, the sound of every shopping mall and taxi from here to eternity. His sound is the cheesiest of Nineties commercial dance music given a turbo boost with every possible megastar from the worlds of rap and R&B relentlessly asserting their heterosexuality on top. It's weapons-grade stuff, thickly layered with fizzing sound (ironically given the album's title), purpose built to cut through any chatter or background sound, lodging in the brain of even the most distracted or brain-dead passer-by, and it is – mostly – entirely foul.

I'm not claiming some major prescience or insight here. I am as guilty as anyone of dipping into the music of the sink estates for a small dose of frisson then returning to art and music that confirm my own worldview. But maybe, just maybe, if we had all paid more attention to what was being said by young British men and women from those estates over the last decade, the events of the past few days might not have come as such a horrific surprise.

As subtlety in popular music becomes increasingly worshipped by heritage-led taste arbiters, we should relish proper shouty moron tunes. Few come more shouty and moronic than LMFAO, a Los Angeles duo named after the text abbreviation for "Laughing my fucking arse off". They comprise Berry Gordy's youngest son Skyler (AKA Skyblu) and his grandson Stefan Gordy (AKA Redfoo), renowned for goon club anthem "I'm in Miami, Bitch". They claim their second album is "more refined" - but it isn't unless your idea of refined is pole dancing to Limp Bizkit.

It's not often you can call pop music revolutionary, but this record is - in more ways than one. Bringing together techniques of engagement that have been honed by Radiohead, Lady Gaga, Lil Wayne and... um... Justin Bieber, the 21-year-old Berkley, California rapper Lil B appears to be on the verge of becoming the first bona fide internet-birthed superstar. I'm Gay (I'm Happy) appeared on iTunes yesterday, announced with a single tweet, with no prior warning whatsoever bar an announcement of its provocative title a couple of months back. It has seemingly no standard record company support behind it, yet it is instantly huge news.

Thursday 23 June

Haven’t left yet but someone sends me an email saying, "Not going to Glastonbury this year and feeling rather smug about it." What are they feeling smug about? The fact that they’re going to have a forgettable, normal weekend while this extraordinary event is going on? It is, of course, to do with ideas of rain. A lot of the pre-Glastonbury coverage focuses endlessly on rain and mud, as if home comforts are everything. When did comfort become the big cultural draw?

This is, not to put too fine a point on it, a masterpiece – but it could easily have been a bloody mess.

N-Dubz's music is throwaway post-grime cheese-pop aimed at fans aged between 10 and 20, max. I've been writing a rearguard action for electronic pop in the pompously self-assured court of rock for more than a decade so I arrived at the Brighton Centre ready to sponge it up.

The Sónar festival occupies a very special place in the New Music calendar – and is this year expanding outwards temporally and geographically, with new franchises in Tokyo and A Coruña, Galicia. Now into its 17th year, the parent festival in Barcelona serves as a vital meeting point for those of all stripes who refuse to acknowledge the polarisation of avant-garde and populism, or of club culture and the mainstream music industry. With 10 or more main stages and untold off-piste club events around the city, it would be impossible to condense even a single day and night of Sónar Barcelona into a standard gig-venue show, but that's what A Taste of Sónar tried to do last night.

Rap audiences are not renowned for being easy to please – but it's a daring performer indeed who is willing to stand up and drop lyrics in front of some couple of hundred babies and toddlers. Yes, as television's Rastamouse has brought reggae culture to Ceebeebies viewers, so this week DJ, promoter, teacher and poet Charlie Dark has been breaking down the elements of hip-hop for those who are more pre-school than old-school.