Elon Musk is not happy with certain celebrities.

He called out Taylor Swift and Justin Bieber by name.

On Saturday, he retweeted a list by the World of Statistics.

It contained the top 10 most followed Twitter account.

Justin Bieber was the second and Taylor Swift was the sixth.

Barack Obama leads the list with 131.4M followers.

“Most of these ‘top’ accounts tweet rarely and post very little content. Is Twitter dying?” Musk asked.

“For example, @taylorswift13 hasn’t posted anything in 3 months,” he commented.

He later added, “And @justinbieber only posted once this entire year.”