Cheryl Cole, Pippa's top OMG moments

Los Angeles - Cheryl Cole's US X Factor hiring and firing has been voted as the most "OMG" moment of the year to date, with Pippa Middleton's turn at the royal wedding coming in second.

The Promise This hitmaker - who was unceremoniously sacked from the TV talent show by music mogul Simon Cowell after just four audition rounds - also topped the chart for shocking fans with an unexpected reconciliation with cheating ex-husband Ashley Cole in July.

After the brunette beauty reportedly got back together with the England and Chelsea soccer ace - whom she divorced in September 2010 - searches for her name on Yahoo! increased by 20% when compared with the same period in 2010.

Pippa Middleton came in second place on the Top 10 OMG! Moments Chart for causing a worldwide stir when she sashayed down the aisle of London's Westminster Abbey in a silhouette-enhancing Sarah Burton gown at her sister Kate's wedding to Britain's Prince William on April 29.

Also among the 10 most shocking celebrity incidents of 2011 so far was the sudden death of Amy Winehouse, Kim Kardashian announcing her engagement to Kris Humphries and Victoria Beckham giving birth to baby daughter Harper Seven.

Yahoo's Top 10 OMG! Moments of 2011

1. Cheryl is dumped from US X Factor and then she reunites with cheating ex-husband Ashley.

2. Pippa Middleton puts princess in the shade: Following the wedding, Pippa still receives more searches on average on Yahoo! than her sister the Duchess of Cambridge.

3. Katie Price divorces Alex Reid 11 months after their quickie Las Vegas wedding.

4. The death of Amy Winehouse: The Brit and Grammy award-winning singer's untimely death caused searches for Amy Winehouse and her music to spike off the charts.

5. Ryan Giggs' affair with Imogen Thomas revealed: Yahoo! searches for the footballer and ex-Big Brother contestant increased by an incredible 1900% as the gagging order was lifted and the scandal broke.

6. Waity Katie finally gets her prince: The wedding of Britain's Prince William and Kate Middleton.

7. Lady Gaga wins international video of the year. Gaga bucks the trends once more as the only celeb to make the top 10 for her 'day job'.

8. Kim Kardashian gets engaged. Details of the proposal and the rumoured cost of the ring were key questions among searchers on Yahoo!.

9. Megan Fox is replaced by Rosie Huntington-Whiteley in Transformers.

10. Victoria Beckham finally gets her girl.