Avril Lavigne was actually pictured out in London on Wednesday night, and from the pictures taken, it certainly looked like Avril was concealing a baby bump under her dress. Many people immediately jumped to conclusions and most are assuming that Avril and her fiance Chad Kroeger are expecting their first child together.

Avril Lavigne was pictured with a possible baby bump
However, People Magazine has denied the rumors, claiming that a source close to Avril assures everyone that she's not pregnant. People explains that the source's theory for the 'bump' under Avril's dress was simply due to the wind blowing and 'playing with her dress' while she left the restaurant she was at.
While it could very well be possible that Avril is not pregnant, the denial seems somewhat uncertain. The pictures were very specific and the bump shown in the picture doesn't seem like it could be caused by 'the wind'.

Are Avril Lavigne and Chad Kroeger expecting their first child?
Either way, we'll find out if the rumors are true within the next couple of months. If Avril is pregnant, it will be news by the time she weds Chad Kroeger. If she's not, we will likely be able to tell next time she's pictured out in public.
Avril Lavigne interview for Talk Stoop in 2012