Jack Johnson (musician)

Observations: A-listers cover a hot topic with another charity record

From the shrinking sheep populations of the Scottish archipelago of St Kilda to the diminishing ice sheets of Greenland, the effects of climate change are ever present. And now here's another charity record – Rhythms del Mundo: Classics, released on Monday. It hopes to raise awareness of the threat to our planet, and like a lot of charity records, has attracted a fine pedigree of A-list contributors: the Killers, the Kooks and Editors all step up, combining forces with Cuban collective Rhythms del Mundo to perform Dad-rock classics like "Imagine" (performed by Jack Johnson) and "Satisfaction" (Cat Power) with a twist.

Raunchy pictures threaten Australian politician's future

It's hard to imagine that the reputation of Pauline Hanson, the former fish and chip shop owner turned right-wing firebrand, could sink any lower in Australia. But today her few remaining fans were cringing following the publication of raunchy photographs of her posing in lingerie, and nearly naked.

Album: Vetiver, Tight Knit, (Bella Union)

It was never going to be easy to follow up a debut album that featured Devendra Banhart and Joanna Newsom, and, sure enough, Andy Cabic's fourth Vetiver album finds the San Francisco-based musician treading water.

Coldplay crowned kings of iTunes

Coldplay was the hottest iTunes album download this year: Its "Viva la Vida" was crowned the best-selling album of 2008, while Leona Lewis' "Bleeding Love" was named the top-selling single.

Album: Jack Johnson, Sleep Through the Static, (Brushfire)

Jack Johnson exemplifies the old showbiz adage about nobody knowing what will become popular. With UK sales of his In Between Dreams now around the 1.3 million mark, the Hawaiian surf-film auteur turned singer-songwriter is clearly a success – yet I still can't fathom his appeal.