Lily Allen feels like she has an ''alien'' inside her.

The 'LDN' hitmaker is currently expecting her second child with husband Sam Cooper and is finding carrying the baby a peculiar sensation.

She tweeted: ''Alien, inside me. #weird (sic)''

On Sunday (25.11.12), Lily and Sam celebrated the first birthday of their daughter Ethel Mary and the 27-year-old pop star has also been reminiscing about the ''excruciating pain'' of her labour, but admitted motherhood was worth all the agony.

She tweeted on Ethel's birthday: ''This time a year ago I was in excruciating pain. It was worth it. #1 #burtday (sic)''

Last week, the 'Not Fair' singer fainted while Christmas shopping in London department store Harrods.

Fortunately, Lily was fine and decided to tuck into a croque monsieur - a toasted cheese and ham sandwich - to give her some much-needed energy.

She tweeted: ''Just fainted in Harrods. #croquemonsieur needed.''

And she recently bit the inside of her cheek during a recent meal out and was in a lot of pain for hours afterwards.

She tweeted: Went for dinner with pals @sebchew and @msaimeephillips and bit off the inside of my cheek. #f**kingpainful (sic)''