Seeing three of the world's most famous acts in the U.S. won't come cheap this summer.

Ticket's to see the British singer during the North American part of her year-long tour are going as high as nearly $2100. The most expensive tickets for Justin Bieber's Purpose World Tour are costing more than $700 and for Barbra Streisand's first tour since 2012, more than $800. 

Adele's tour begins July 5. The 74-year-old Streisand's tour starts later in the summer. Bieber has been touring since March and concludes July 19. 

Below is a ticket-buying guide to some of the hottest of the events of the summer, with ticket pricing provided by ticket aggregator TiqIQ.

Adele Live 2016

Adele's returned to the spotlight last year after spending three years working on her latest album. This year is shaping up as her busiest on the road yet. Ticket prices are averaging $933 across all scheduled North American dates. The tour kicks off in Saint Paul at the Xcel Energy Center. The tour will run into November and wraps up in Houston. Many of Adele's stops include multiple dates, including six nights apiece in Los Angeles and New York City. Both nights at New York's iconic Madison Square Garden in September are averaging an unthinkable $1418, with the cheapest ticket for either date priced at $377. Her most expensive nights, however, are likely to be Nov. 4 and 5 shows at the Frank Erwin Center in Austin, Tex. where tickets are averaging $1861. Her Nov. 5 performance is boasting resale ticket averages of an incredible $2,088, with the cheapest ticket priced at $474.

Purpose World Tour 

Bieber launched his massive Purpose World on March 9, and the tour has a handful of major shows left before it ends. The huge run will wrap after two big nights at New York City's Madison Square Garden. Tickets on the resale market are averaging $460, and his New York City stops will not be cheap. Tickets for that show are averaging $745, with the cheapest ticket at $175. The "Sorry" singer is touring in support of his 2015 release Purpose, which has spawned three No. 1 hits on the Billboard charts.

Barbra Streisand ' Barbra Streisand 2016 ' Average Ticket Price: $568

One of the world's

greatest living performers, Streisand


will return to the road this August to support a new album,

Encore: Movie Partners Sing Broadway

. The brief tour will launch Aug. 2 in Los Angeles and wrap Aug. 23 in Toronto.

Tickets for Streisand

went on sale May 25, and the resale market has been flooded with these hard-to-get tickets. Tickets are averaging $568 for all performances, with the highest price for her Aug. 11 show in her birth place of Brooklyn. For that date at the Barclays Center, resale tickets are averaging $808. But the cheapest ticket will cost just $180.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.