UnScramble this Word: g l a s r y c g?

Questions

1854, during the Crimean War, what event came to be known as one of the greatest military blunders of all times?

May 2002, who had a top 20 hit with Reason?

May 2002, who had a top 20 hit with It takes more?

May 2002, who had a top 20 hit with Dont let me get me?

May 2002, name of Westlifes top 20 hit?