"The Song Remains The Same" was part of a chart-topping album by Led Zeppelin, but when it comes to prop bets for the Super Bowl, bettors may be singing a different tune. One of the more popular offerings among hundreds of prop bets available for Super Bowl LV is the length of "The Star Spangled Banner."

Those hoping to cash in before Sunday's 6:30 p.m. kickoff at Tampa's Raymond James Stadium want to know whether the anthem duet by R&B singer Jazmine Sullivan and country music star Eric Church will go Over or Under the established betting line that many sportsbooks listed at 1 minute, 59 seconds.

It's the first duet since Super Bowl XL, when Aaron Neville and Aretha Franklin clocked in at 2:08. That alone gives bettors reason to wonder if this year's performance will easily exceed two minutes. Demi Lovato needed 1:49 to complete her rendition a year ago while Gladys Knight finished in 2:01 the previous year.

Before you make any Super Bowl or national anthem prop bets, you NEED to see what R.J. White, SportsLine's No. 1 NFL expert, has to say.

CBS Sports' Fantasy and gambling editor, White is entering the title game on an 80-56 run on all NFL picks, returning more than $1,500 during that span. It's no surprise, as White has cashed huge twice in the world's most prestigious football handicapping competition, the Las Vegas SuperContest.

Now, he's made a bonus pick on the national anthem and found a critical X-factor that has him jumping all over one side of this prop bet. You ABSOLUTELY need to see it before you lock in your anthem prop picks.

So how long will the national anthem run? And what is the critical X-factor? ... Join SportsLine right now to see which anthem prop you need to bet RIGHT NOW, all from the seasoned expert who's 80-56 on NFL picks!