Recently, Katy Perry captured the world's attention by dressing like an alien from a planet whose prevailing aesthetic has more in line with Gaga than Giger (see the "E.T." video). This summer she'll come back down to Earth for her "California Dreams" tour. Robyn and Janelle Monáe will appear alongside Perry at certain points along the incredibly long stretch. Really, this is a marathon. And the dates are [deep inhale] as follows:

Katy Perry's "California Dreams" Tour
6/7 - Atlanta - Arena at Gwinnett Center with Robyn - Tickets
6/9 - Orlando, Fla. - UCF Arena with Robyn - Tickets
6/10 - Tampa, Fla. - St. Pete Times Forum with Robyn - Tickets
6/11 - Ft. Lauderdale, Fla. - Bank Atlantic Center with Robyn - Tickets
6/14 - Raleigh, N.C. - RBC Center with Robyn - Tickets
6/15 - Columbia, Md. - Merriweather Post Pavilion with Robyn- Tickets
6/17 - Uniondale, N.Y. - Nassau Veterans Memorial Coliseum with Robyn - Tickets
6/18 - Boston - TD Garden with Robyn - Tickets
6/19 - Newark, N.J. - Prudential Center with Robyn - Tickets
6/23 - Pittsburgh - Petersen Events Center with Marina & The Diamonds - Tickets
6/24 - Philadelphia - Wells Fargo Center with Marina & The Diamonds - Tickets
6/25 - Uncasville, Conn. - Moheagn Sun Arena - Tickets
6/28 - Detroit - Palace of Auburn Hills with Marina & The Diamonds - Tickets
6/29 - Toronto - Air Canada Centre with Marina & The Diamonds - Tickets
6/30 - Toronto - Air Canada Centre with Marina & The Diamonds - Tickets
7/2 - Montreal - Bell Centre with Marina & The Diamonds - Tickets
7/3 - Ottawa, Ontario - ScotiaBank Place with Marina & The Diamonds - Tickets
7/5 - Cleveland - Quicken Loans Arena with Marina & The Diamonds - Tickets
7/7 - Milwaukee, Wis. - Marcus Amphitheater – Milwaukee Summerfest with Marina & The Diamonds - Tickets
7/8 - Chicago - Allstate Arena with Marina & The Diamonds - Tickets
7/9 - St. Paul, Minn. - Xcel Energy Center with Marina & The Diamonds - Tickets
7/13 - Regina, Saskatchewan - Brandt Centre with Janelle Monáe - Tickets
7/14 - Winnipeg, Manitoba - MTS Centre with Janelle Monáe -Tickets
7/16 - Calgary, Alberta - Scotiabank Saddledome – Calgary Stampede with Janelle Monáe - Tickets
7/17 - Edmonton, Alberta - Rexall Place with Janelle Monáe - Tickets
7/19 - Vancouver, British Columbia - Rogers Arena - Tickets
7/20 - Seattle - KeyArena at Seattle Center - Tickets
7/22 - Portland, Oregon - Rose Garden Arena with Robyn - Tickets
7/23 - Boise, Idaho - Taco Bell Arena with Robyn - Tickets
7/25 - Salt Lake City - Energy Solutions Arena with Robyn  - Tickets
7/26 - Denver - 1stBank Center with Robyn - SOLD OUT
7/28 - Dallas - Verizon Theatre at Grand Prairie with Robyn - Tickets
7/29 - Houston - Toyota Center with Robyn - Tickets
7/30 - Austin, Texas - Frank Erwin Center with Robyn - Tickets
8/3 - Phoenix - Comerica Theatre with Robyn - Tickets
8/5 - Los Angeles - Nokia Theatre LA Live with Robyn - Tickets
8/6 - Los Angeles - Nokia Theatre LA Live with Robyn - Tickets
8/7 - Los Angeles - Nokia Theatre LA Live with Robyn - Tickets
8/9 - San Diego - Valley View Casino Center - Tickets
8/12 - San Jose, Calif. - HP Pavilion - Tickets
8/13 - Santa Barbara, Calif. - Santa Barbara Bowl - Tickets
8/14 - Santa Barbara, Calif. - Santa Barbara Bowl - Tickets
8/17 - Kansas City, Mo. - Sprint Center - Tickets
8/19 - Nashville, Tenn. - Bridgestone Arena with Janelle Monáe - Tickets
8/20 - St. Louis - Scottrade Center with Janelle Monáe - Tickets
9/7 - San Antonio - AT&T Center with Janelle Monáe - Tickets (TBA)
9/8 - New Orleans - New Orleans Arena with Janelle Monáe - Tickets
9/10 - Louisville, Ky. - KFC Yum! Arena with Janelle Monáe - Tickets
9/11 - Grand Rapids, Mich. - Van Andel Arena with Janelle Monáe - Tickets (TBA)
9/13 - Columbus, Ohio - Schottenstein Arena with Janelle Monáe - Tickets
9/14 - Indianapolis - Conseco Fieldhouse with Janelle Monáe -Tickets (TBA)
9/16 - Omaha, Neb. - Qwest Center with Janelle Monáe - Tickets (TBA)
9/17 - Tulsa, Okla. - BOK Center with Janelle Monáe - Tickets (TBA)