Never a dull week in the art world, here are our five stories you might’ve missed. Let us know what caught your eye in the comments or on our Facebook page.

1. It has been announced the largest exhibition of Picasso portraits in the UK in 20 years will arrive at the National Portrait Gallery in October. The collection displayed will include works loaned from international institutions and never-before-exhibited works from private collections. The show, Picasso Portraits, will explore the varying styles Picasso chose to portray his friends, lovers, wives and associates; with portraits including Woman with Hat (Olga) (1935), and Self-Portrait with Palette (1906). Click here to read more on this story.

2. World renowned artist and “Godfather of British pop art”, Peter Blake has joined forces with Bentley to create a one of a kind car. The Bentley Continental GT V8 S Convertible has been donated to the Care2Save Charitable Trust, which provides palliative and hospice care the world over. The car has the bold colours (blue, yellow, red and pink) one associates with pop art, and Blake’s recognizable St James red heart motif, hand painted on to the yellow bonnet. His signature is also integrated on the dashboard and embroidered on all four headrests, and a personalized playlist from Blake’s favourite music will also be included with the car. The car will be auctioned for charity by Bonhams at the Goodwood Festival of Speed on 24 June. (via Art Lyst)

3. A retired journalist who has spent his life modestly collecting works of art has donated his collection to the Hepworth Wakefield gallery after he dies. Tim Sayer, who has no children; has collected works by Antony Gormley, Bridget Riley, David Hockney, Henry Moore, Louise Bourgeoise, Gerhard Richter, Alexander Calder (plus many, many more), and can barely move about in his London townhouse – which is why a work by Antony Gormley has ended up in the loo. Sayer says of his collection: “There was a formidable lady at the Contemporary Art Society called Nancy Balfour, who said to me, ‘Darling, only buy living artists!’ The idea was to help artists working now, which seemed a good thing.” (via The Telegraph)

4. A new exhibition, Robert Motherwell: The Art of Collage, has opened at the Paul Kasmin Gallery in New York. The exhibition features “uniquely important” works, explores the artist’s lifelong fascination with the medium, and demonstrates the fascinating ways with which he employed, and evolved, the style. The exhibition will run until 21 May this year. (via Art Daily)

5. News broke this week that a mystery Caravaggio, lost for centuries and worth millions ($178m), found in an attic near Toulouse in France, is indeed an authentic work by the Italian Renaissance master. The painting (pictured), Judith cutting off the head of Holofernes (approx. 1600-1610), was verified in Paris by expert Eric Turquin and top Caravaggio specialist, Nicola Spinosa. However, many other experts have doubted Turquin’s claims, and he admitted “some serious” art historians “had attributed the work to (Louis) Finson”, a Flemish painter and disciple of Caravaggio who died in 1617. What do you think? (via The New York Times)