Tweet you later Russell! Katy Perry makes the ultimate statement by 'unfollowing' her estranged husband Brand on Twitter

They announced their separation less than a month ago, but it now the nail is well and truly in the coffin for Katy Perry and Russell Brand.

In a move which echoes the end of many modern relationships in the age of social media, Perry has 'unfollowed' her estranged husband on Twitter.

Brand's 'RustyRockets Twitter handle is now not included in the 83 people the singer follows on the social networking site.

Moving on: Katy Perry has 'unfollowed' her estranged husband Russell Brand's Twitter account, with 'Rusty Rockets' not among the 83 people she follows

Carrying on: Katy left her troubles back home in the US to perform for her fans in Indonesia

Making a statement: Katy, who performed in Indonesia on Thursday night, has ended she and Russell's connection via social media

However, her former beau is still following his wife on his Twitter page, listing @katyperry among 78 people.

But the British comic last tweeted on January 5.

The couple have a flirty history on Twitter, with Brand infamously posting a picture of his wife sporting no make-up on the social networking site.

According to Us Weekly, Perry's move to remove Brand from her Twitter is 'unsurprising' as the singer is only communicating with the 26-year-old via phone or email.

'She's limiting those interactions,' a source told the magazine. 'He's being so atrocious that she feels like she never really knew him.'

The source added: 'She doesn't want to look battered and have people for sorry for her.

'She's very strong and confident.'

Perry had been largely absent from her Twitter page following Brand filing for divorce last month, but has enthusiastically been back, tweeting about the final date of her California Dreams tour in Indonesia this weekend.

The star performed in Jakarta on Thursday night, concentrating on her work rather than publicly discussing her marriage woes.

She appeared not to have a care in the world, performing on stage with gusto and even flirting with a male fan.

All about work: Russell Bran is still following his estranged wife on Twitter, although his last tweet was on January 5

All about work: Russell Brand is still following his estranged wife on Twitter, although his last tweet was on January 5

Katy kissed the half-naked man on stage and he kissed her on her hand.

Her performance came after another report in Us Weekly which claimed the singer is concerned by rumours her estranged husband plans to write a third memoir.

Russell already wrote two autobiographies, My Booky Wook and My Booky 2.

Carrying on: Katy left her troubles back home in the US to perform for her fans in Indonesia

The alleged new book would supposedly cover the couple’s marriage.
Even though the 36-year-old comedian denies reports he will write a tell-all book, a source has claimed that Katy is worried.
The person tells Us Weekly: ‘Katy is insulted and feels betrayed that Russell has treated her so poorly. She will never forgive him. Ever.’

On stage flirting: The singer planted a kiss on one of her fans during the show in Indonesia

Carrying on: Katy left her troubles back home in the US to perform for her fans in Indonesia

Showing love: A fan in Jakarta, Indonesia plants a kiss on the singer's hand

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Before the split: Katy Perry and Russell Brand attended the MTV Video Music Awards together in Los Angeles in August

Last week the singer posted a message on her Twitter page saying that ‘no one’ speaks for her.
The I Kissed a Girl chart topper flew to Indonesia on January 16, three days after Russell jetted into Los Angeles from the UK.
She was also recently spotted putting a brave face on her troubles, filming an Adidas advertisement in Santa Barbara.
She had largely been quiet since the break-up, even avoiding turning up to the People's Choice Awards last week.
Meanwhile Russell has said that he was doing 'quite well' since the couple's high-profile split.
The comic, 36, spoke last week during a question and answer session in Pasadena, California, where he was promoting his new show Strangely Uplifting
During the press conference, he made reference to the headline-making December 30 split from his wife.
'I'm quite well, thank you. Are you asking because of recent events?' he said.
'Well, I suppose what you're doing is you're making the mistake as seeing time as linear.'
Perry said last year that her husband inspired many of the tracks on her Teenage Dream album.
She said: ‘I finished it with him in mind knowing that it is like the movies.
‘He’s in films and stuff so it made sense.
‘Sometimes you’re in a situation where it feels like this is the best you can get.
‘I really do believe in true love and you should really find it.’