Seth Rogen thinks Justin Bieber is ''a piece of s**t''.

The 'Knocked Up' actor was seriously unimpressed when he heard about the 19-year-old singer being charged with drink driving, resisting arrest and drag racing in Miami, Florida on Thursday morning (23.01.14), and took to Twitter to make his views crystal clear.

He wrote: ''''All jokes aside, Justin Bieber is a piece of s**t.''

The 31-year-old star's tweet was shared over 70,000 times other users within four hours.

'Girls' creator and star Lena Dunham - who has suffered from extreme OCD her entire life - was also quick to react, teasing: ''The only crazy part of Justin Bieber arrest is that he was 'popping anti-depressants all day.' Anti-depressants take like 3 months to work.''

Meanwhile, Lady GaGa rushed to Justin's defence and asked her fans to show compassion for the troubled teen.

The 27-year-old 'Applause' singer wrote on her official website: ''Hey monsters. I know everyone today is taking about Justin's arrest and all sorts of words and judgements are happening on the Internet.

''We may not understand everything celebrities do because there's only so much we see, but Justin and Beliebers were 'born this way' too. Let's spread love and compassion to Beliebers today. That is what we are all about.''