Social media satirist Hilde Lynn Helphenstein, better known as her alter ego Jerry Gogosian, has died in Sao Paulo aged 40.

Brazilian news site Globo.com reported she was found dead in the luxury Rosewood Sao Paulo hotel on Sunday.

They quoted a police report saying she was found by "a man who identified himself as her plastic surgeon" and that pills and an empty vodka bottle were in the room.

The man also told investigators she had recently been in hospital after a "possible overdose".

Helphenstein started out running her own gallery in Los Angeles but found fame when she set up her Instagram account offering an acerbic view of the art market to her 151,000 followers.

About 12 months ago, she said she was winding the account down having "grown out" of the online persona named after critic Jerry Saltz and gallerist Larry Gagosian.

A student work by Lucian Freud is going on show for the first time today after experts proved it was one of his despite years of denials.

Freud painted Man in a Black Scarf in 1939 while he was still a student but always denied the work was his apparently because of a feud with its owners.

The Guardian reported Denis Wirth-Miller and Richard Chopping, who had gone to school with the artist, were jealous of him and even kept a list written in their school days called "13 Reasons to Hate Lucian".

An attempt by Christie's to identify the work as a genuine Freud was overturned in 1985 when he insisted he had not painted it, but recently rediscovered documents from his old art school proved the case.

The painting is on show at London's Garden Museum until September 20.

The Sydney studio where Australian artist Brett Whiteley lived and worked before his death in 1992 is due to re-open next month after two years refurbishment work.

The building, which is run as a museum by the Art Gallery of New South Wales, was Whiteley's home from 1988 and is full of unfinished paintings, his library and a graffiti wall covered with quotes and images.

It has had a new roof to "ensure a controlled interior environment" for the works on show and a lift has been added to make it more accessible.

The studio in the suburb of Surry Hills reopens on Saturday July 25 with a new exhibition examining his work in the 1970s when he returned to Australia after a decade living abroad.

Zimbabwean artist Nora Chipaumire has unveiled a new installation at London's Tate Modern today as part of its annual Infinities Commission.

The work, called Gadzi, is an "immersive, multi-sensory environment" including sound, sculpture and film inspired by African legend.

Chipaumire has brought the granite outcrops and red soil of her homeland to the gallery's East Tank. She will return to the installations on select dates this month to lead a musical procession through the work.

The commission is aimed at international artists who are asked to install "visionary new work" for the gallery.

1 - Ryan Inouye and Yina Jimenez Suriel are among the curatorial team announced today for next year's Sao Paulo biennale in Brazil. They join a team of nine led by Amanda Carneiro and Raphael Fonseca curating the event which opens in September 2027.

2 - The investigation into last year's Louvre heist in Paris is looking at a possible link to diamond dealers in Antwerp, Belgium, according to reports in France. Jewelry worth around $102 million was never recovered after the robbery and French police believe it may have been fenced through criminal networks in the two countries.

3 - London's National Gallery is extending its opening hours for the summer from next month. The gallery, led by director Gabriele Finaldi, will be open to 7pm daily from July 3 to August 31.

4 - Murrell Green was selected from more than 300 applicants to become executive director of San Francisco's African American Arts and Culture Complex. He is a former youth worker at the center which was set up in 1989 and is currently hosting a show of works by Emory Douglas.

5 - Former broadcast executive Dawn Airey has been named the new chair of Arts Council England replacing former Tate chief Nicholas Serota. Airey will begin her four-year term at the organization, which distributes public funds to the creative industries, on August 1.