Avril Lavigne celebrated her 30th birthday without her husband Chad Kroeger on Saturday (27.09.14).

The 'Girlfriend' hitmaker and the Nickelback rocker, who got married 14 months ago, have fuelled more rumours their relationship is on rocks after the 39-year-old hunk was notably missing from his wife's party at the Belliagio Hotel in Las Vegas last weekend.

However, the blonde beauty, who was wearing a pink satin above-the-knee figure-hugging dress, didn't let her husband's absence get her down as she was full of smiles when she posed for pictures with her sister-in-law Amie Lavigne and best friend Caryn Albert.

Meanwhile, the couple, who tied the knot at Château de La Napoule in the South of France, sparked speculation last month that they were heading for a split after Avril was spotted without her diamond wedding ring and pear-shaped engagement ring.

A source said previously: ''It's over. He has been going around Los Angeles and telling people that they're divorcing.''

However, friends of the stunning star believe Chad, 39, is to blame for their alleged marriage issues because of his negative attitude.

The insider added: ''Chad is just a complete jerk in the way he talks to her, and the way he talks to people in general. A lot of her friends don't like him.''

The 'Complicated' singer was previously married to Sum 41 star Deryck Whibley, whom she split from in 2009 after three years of marriage.