January 12, 2010 09:43:36 GMT
Beside posting baby-related tweets, the singer was also spotted visiting children's shop in Hampstead with fiance Russell Brand.
Katy Perry has fuelled speculation she's expecting after she was spotted shopping in a baby store - just days after accepting Russell Brand marriage proposal. The couple, who began dating in September 2009, was spotted browsing a children's boutique in North London on Sunday, January 10 sparking further reports the pair is set to start a family.
A source tells Britain's The Sun, "Russ and Katy had a wander around Hampstead. They visited children's shoe shop Cubs and had a lot of fun checking out all the little bootees."
The "I Kissed A Girl" hitmaker became engaged after Brand proposed on New Year's Eve during a vacation in India. She then prompted pregnancy rumours after posting messages about her food cravings during their holiday on her Twitter.com page.