Online hookup for Amy and Blake

Amy Winehouse is sending love notes to her ex-husband via the internet.

The ‘Rehab’ singer – whose divorce from Blake Fielder-Civil was finalised in August – spent yesterday morning reminiscing with her former spouse through social networking website Facebook.

Blake – who nicknamed Amy ‘Lioness’ – responded with an equally affectionate message four hours later.

This is not the first time Amy, 26, has used Facebook to contact Blake.

In August, it was revealed she had been posing as her cat to send secret messages to Blake via Facebook.

Blake originally filed to divorce Amy from prison – where he was serving a sentence for grievous bodily harm and perverting the course of justice - in January after she was pictured with other men.

Amy admitted adultery as the reason for their divorce in the initial hearing.

However, weeks after their divorce was finalised, Amy’s father Mitch caught the couple in bed together.

The steamy rendezvous was believed to have been Amy and Blake's first meeting in 14 months.

Since they split last year, both Amy and Blake – who married in 2007 - have been battling addictions to alcohol and drugs.

In a documentary called 'Saving Amy', which recently aired in Britain, Mitch claimed Blake was the reason Amy started abusing illicit substances and warned the pair "would kill each other if they got back together".