Favourites Denmark could prove a disaster for bookies if they land their predicted win at the Eurovision Song Contest tomorrow night.
The Danish entry Only Teardrops by Emmelie de Forest is now 4/6 odds on to win the show - way ahead of other entrants.
The bookmaker says it will face a six-figure payout if Denmark pulls off a win in Malmo, Sweden, in the pan-Europe spectacular being televised by BBC1 and broadcast by Radio 2.
Norway's I Feed You My Love by Margaret Berger is second favourite at 5/1, while Ukraine is at 9/1.
William Hill's spokesman Rupert Adams said: "Emmelie looks very hard to beat and she could spark the biggest payout in the Eurovision's long and distinguished history.
"Tyler had been hoping to avenge the dismal performance by the UK last year when Engelbert Humperdinck limped into second to last place with Love Will Set You Free.But betting shows she is more fancied to come last than first with a price of 8/1 that she is bottom of the points table.
Adams said: "Normally we see a patriotic punt on the Eurovision but it looks like the public have given up on our chances and Bonnie is simply friendless."
Bonnie, who is performing the track Believe in Me, has still managed to make a big impression in Malmo which has been her home for the past few days in preparation for the huge show.
At a concert featuring five of the leading countries involved in backing Eurovision, the crowd was chanting her name as each of the acts came on stage. And as she dined in a restaurant with her team and BBC staff with a traditional Swedish feast, the whole restaurant joined in singing her entry.