Best celebrity Twitter and Instagram posts of the week: Chris Brown, Madonna, Zoella and Alfie

R&B singer Chris Brown finally confirmed he is the father of daughter Royalty this week and Madonna used Instagram to hit out at those who criticised her for kissing Drake at the Coachella music festival.

Celebrities have been very busy on social media this week!

Music lovers were sent into a frenzy when Glastonbury announced the first lineup for this year's music festival, while YouTube vloggers Zoella and Alfie Deyes had a very special surprise for fans.

IBTimes UK looks back at all the social media fun from the last week...

Madonna blasts haters over Drake kiss:

The queen of pop was absolutely ridiculed for snogging Drake on stage as he headlined Coachella on 12 April, especially as he looked completely mortified after the deed. However, Madge, 56, did not care what anyone thought and told them as much via Instagram:

Chrissy Teigen shows off stretch marks:

Hurrah, supermodels get stretch marks too! John Legend's wife proved she was just like every other woman when she bared her stretch marks for all to see on Instagram. The 29-year-old was applauded for sharing such an intimate picture.

Chris Brown finally shares pictures of Royalty:

After weeks of speculation, the Loyal singer has finally confirmed he is the father of 10-month-old Royalty but sharing two photos of his daughter on Instagram. Also, can you spot her wearing red nail polish?!

Beyonce on holiday in Hawaii:

Queen Bey and hubby Hov jetted off to the tropical island of Hawaii early in April to celebrate their seventh wedding anniversary. After sharing photos of their romantic holiday on her Tumblr, the 7/11 singer shared a round-up of their getaway with this Instagram video:

Glastonbury announces line-up:

The music festival's organisers finally revealed the artists whom ticket-holders can expect to see in June, with Pharrell Williams, Patti Smith, Florence And The Machine and Mary J. Blige, among the acts announced in the first line-up.

Zoella and Alfie heading to Madame Tussauds:

YouTube vloggers Zoella and Alfie announced that they have been selected to have waxwork figures at London's Madame Tussauds. Some believe the couple do not deserve the opportunity, but needless to say, their fans are ecstatic:

Gwyneth Paltrow food stamp challenge:

It doesn't take much for the Oscar-winner to annoy the public but she really rattled cages after announcing she would be attempting the £29 food stamp challenge. Paltrow sparked outrage when she shared this Twitter photo of her grocery shop, with many complaining that she didn't spend her money wisely.

Paltrow admitted to giving up on the challenge four days later.

Cara Delevingne launches Burberry's Snapchat:

Who better to launch the brand's new Snapchat account than their ambassador? The British supermodel shared some interesting photos from her Los Angeles hotel room and fortunately, some super quick Snapchatters were able to screen grab them:

Robert Downey Jr. joins Instagram:

It took him a while but RDJ is finally on Instagram. The actor celebrated by sharing a photo with his Avengers: Age Of Ultron co-stars while backstage at Jimmy Kimmel. Pretty awesome!